diff --git a/src/components/message/ChatHeader.tsx b/src/components/message/ChatHeader.tsx
index 36a20db..aa1c3a2 100644
--- a/src/components/message/ChatHeader.tsx
+++ b/src/components/message/ChatHeader.tsx
@@ -16,6 +16,7 @@ interface ChatHeaderProps {
   typingText?: string;
   onClearChat?: () => void;
   onDeleteConversation?: () => void;
+  onReportUser?: () => void;
 }
 
 export function ChatHeader({
@@ -30,6 +31,7 @@ export function ChatHeader({
   typingText,
   onClearChat,
   onDeleteConversation,
+  onReportUser,
 }: ChatHeaderProps) {
   const [isMenuOpen, setIsMenuOpen] = useState(false);
   const [isMuted, setIsMuted] = useState(false);
@@ -49,9 +51,7 @@ export function ChatHeader({
     },
     {
       label: 'Report User',
-      onClick: () => {
-        // Placeholder — no backend endpoint yet
-      },
+      onClick: () => onReportUser?.(),
     },
     {
       label: 'Delete Conversation',
diff --git a/src/components/message/MessagingPage.tsx b/src/components/message/MessagingPage.tsx
index 3a6383c..738a59c 100644
--- a/src/components/message/MessagingPage.tsx
+++ b/src/components/message/MessagingPage.tsx
@@ -7,6 +7,7 @@ import { ChatHeader } from './ChatHeader';
 import { MessageInput } from './MessageInput';
 import { ChatDropdownMenu, type DropdownMenuItem } from './ChatDropdownMenu';
 import { NewConversationModal, type ConnectedContact } from './NewConversationModal';
+import { ReportUserModal } from './ReportUserModal';
 import { useMessaging } from '@/hooks/useMessaging';
 import { connectionRequestsService, type ConnectionRequest } from '@/services/connection-requests.service';
 import { uploadService } from '@/services/upload.service';
@@ -159,6 +160,7 @@ export function MessagingPage({ initialConversationId }: { initialConversationId
   const [isLoadingAgents, setIsLoadingAgents] = useState(false);
   const [isStartingConversation, setIsStartingConversation] = useState<string | null>(null);
   const [isComposeOpen, setIsComposeOpen] = useState(false);
+  const [isReportModalOpen, setIsReportModalOpen] = useState(false);
   // Store converted avatar URLs by conversation ID
   const [conversationAvatarUrls, setConversationAvatarUrls] = useState<Record<string, string>>({});
   // Store converted file URLs by message ID (for S3-stored images/files)
@@ -595,6 +597,17 @@ export function MessagingPage({ initialConversationId }: { initialConversationId
         }}
       />
 
+      {/* Report user modal */}
+      {currentConversation && (
+        <ReportUserModal
+          isOpen={isReportModalOpen}
+          onClose={() => setIsReportModalOpen(false)}
+          reportedUserId={currentConversation.otherParty?.userId || currentConversation.otherParty?.id || ''}
+          reportedUserName={currentConversation.otherParty?.name || 'User'}
+          conversationId={currentConversation.id}
+        />
+      )}
+
       <div className="border border-[#00293d]/10 rounded-[20px] bg-white overflow-hidden">
         {/* Header */}
         <div className="flex items-center gap-4 p-4 border-b border-[#00293d]/10">
@@ -818,6 +831,7 @@ export function MessagingPage({ initialConversationId }: { initialConversationId
                   typingText={typingUserNames.length > 0 ? `${typingUserNames.join(', ')} is typing...` : undefined}
                   onClearChat={clearMessages}
                   onDeleteConversation={handleDeleteConversation}
+                  onReportUser={() => setIsReportModalOpen(true)}
                 />
 
                 {/* Messages area wrapper */}
diff --git a/src/components/message/ReportUserModal.tsx b/src/components/message/ReportUserModal.tsx
new file mode 100644
index 0000000..27c682b
--- /dev/null
+++ b/src/components/message/ReportUserModal.tsx
@@ -0,0 +1,164 @@
+'use client';
+
+import { useState } from 'react';
+import { userReportsService } from '@/services/user-reports.service';
+
+const REPORT_REASONS = [
+  'Spam or scam',
+  'Harassment or bullying',
+  'Inappropriate content',
+  'Fake profile',
+  'Unprofessional behavior',
+  'Other',
+];
+
+interface ReportUserModalProps {
+  isOpen: boolean;
+  onClose: () => void;
+  reportedUserId: string;
+  reportedUserName: string;
+  conversationId?: string;
+}
+
+export function ReportUserModal({
+  isOpen,
+  onClose,
+  reportedUserId,
+  reportedUserName,
+  conversationId,
+}: ReportUserModalProps) {
+  const [selectedReason, setSelectedReason] = useState('');
+  const [description, setDescription] = useState('');
+  const [isSubmitting, setIsSubmitting] = useState(false);
+  const [submitted, setSubmitted] = useState(false);
+  const [error, setError] = useState('');
+
+  if (!isOpen) return null;
+
+  const handleSubmit = async () => {
+    if (!selectedReason) {
+      setError('Please select a reason');
+      return;
+    }
+
+    setIsSubmitting(true);
+    setError('');
+
+    try {
+      await userReportsService.createReport({
+        reportedUserId,
+        conversationId,
+        reason: selectedReason,
+        description: description.trim() || undefined,
+      });
+      setSubmitted(true);
+    } catch (err: unknown) {
+      const message = err instanceof Error ? err.message : 'Failed to submit report';
+      // Check for axios error response
+      const axiosErr = err as { response?: { data?: { message?: string } } };
+      setError(axiosErr?.response?.data?.message || message);
+    } finally {
+      setIsSubmitting(false);
+    }
+  };
+
+  const handleClose = () => {
+    setSelectedReason('');
+    setDescription('');
+    setSubmitted(false);
+    setError('');
+    onClose();
+  };
+
+  return (
+    <div className="fixed inset-0 bg-black/50 flex items-center justify-center z-50 p-4">
+      <div className="bg-white rounded-[20px] w-full max-w-[440px] overflow-hidden">
+        {submitted ? (
+          // Success state
+          <div className="p-6 text-center">
+            <div className="w-14 h-14 bg-green-100 rounded-full flex items-center justify-center mx-auto mb-4">
+              <svg className="w-7 h-7 text-green-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M5 13l4 4L19 7" />
+              </svg>
+            </div>
+            <h3 className="font-fractul font-bold text-[18px] text-[#00293D] mb-2">Report Submitted</h3>
+            <p className="font-serif text-[14px] text-[#00293D]/70 mb-6">
+              Thank you for reporting. Our team will review this and take appropriate action.
+            </p>
+            <button
+              onClick={handleClose}
+              className="px-6 py-2.5 bg-[#E58625] text-white rounded-full font-serif font-semibold text-[14px] hover:bg-[#E58625]/90 transition-colors cursor-pointer"
+            >
+              Done
+            </button>
+          </div>
+        ) : (
+          // Report form
+          <>
+            <div className="px-6 py-4 border-b border-[#00293d]/10">
+              <h3 className="font-fractul font-bold text-[16px] text-[#00293D]">
+                Report {reportedUserName}
+              </h3>
+              <p className="font-serif text-[13px] text-[#00293D]/60 mt-1">
+                Select a reason for reporting this user
+              </p>
+            </div>
+
+            <div className="px-6 py-4 space-y-2 max-h-[300px] overflow-y-auto">
+              {REPORT_REASONS.map((reason) => (
+                <label
+                  key={reason}
+                  className={`flex items-center gap-3 p-3 rounded-[10px] cursor-pointer transition-colors ${
+                    selectedReason === reason
+                      ? 'bg-[#E58625]/10 border border-[#E58625]'
+                      : 'border border-[#00293d]/10 hover:bg-[#00293d]/5'
+                  }`}
+                >
+                  <input
+                    type="radio"
+                    name="report-reason"
+                    value={reason}
+                    checked={selectedReason === reason}
+                    onChange={() => setSelectedReason(reason)}
+                    className="w-4 h-4 text-[#E58625] accent-[#E58625]"
+                  />
+                  <span className="font-serif text-[14px] text-[#00293D]">{reason}</span>
+                </label>
+              ))}
+
+              {selectedReason && (
+                <textarea
+                  value={description}
+                  onChange={(e) => setDescription(e.target.value)}
+                  placeholder="Add more details (optional)"
+                  rows={3}
+                  className="w-full mt-3 px-3 py-2 border border-[#00293d]/10 rounded-[10px] font-serif text-[14px] text-[#00293D] placeholder:text-[#00293D]/40 focus:outline-none focus:border-[#E58625] resize-none"
+                />
+              )}
+
+              {error && (
+                <p className="text-red-500 font-serif text-[13px] mt-2">{error}</p>
+              )}
+            </div>
+
+            <div className="px-6 py-4 border-t border-[#00293d]/10 flex justify-end gap-3">
+              <button
+                onClick={handleClose}
+                className="px-5 py-2.5 border border-[#00293d]/20 rounded-full font-serif font-medium text-[14px] text-[#00293D] hover:bg-[#00293d]/5 transition-colors cursor-pointer"
+              >
+                Cancel
+              </button>
+              <button
+                onClick={handleSubmit}
+                disabled={!selectedReason || isSubmitting}
+                className="px-5 py-2.5 bg-red-600 text-white rounded-full font-serif font-semibold text-[14px] hover:bg-red-700 transition-colors disabled:opacity-50 cursor-pointer"
+              >
+                {isSubmitting ? 'Submitting...' : 'Submit Report'}
+              </button>
+            </div>
+          </>
+        )}
+      </div>
+    </div>
+  );
+}
diff --git a/src/services/user-reports.service.ts b/src/services/user-reports.service.ts
new file mode 100644
index 0000000..5dfd88c
--- /dev/null
+++ b/src/services/user-reports.service.ts
@@ -0,0 +1,29 @@
+import api, { ApiResponse } from './api';
+
+interface CreateReportDto {
+  reportedUserId: string;
+  conversationId?: string;
+  reason: string;
+  description?: string;
+}
+
+interface UserReport {
+  id: string;
+  reporterId: string;
+  reportedUserId: string;
+  conversationId: string | null;
+  reason: string;
+  description: string | null;
+  status: string;
+  createdAt: string;
+}
+
+class UserReportsService {
+  async createReport(dto: CreateReportDto): Promise<UserReport> {
+    const response = await api.post<ApiResponse<UserReport>>('/user-reports', dto);
+    return response.data.data;
+  }
+}
+
+export const userReportsService = new UserReportsService();
+export type { CreateReportDto, UserReport };