diff --git a/src/app/(auth)/register/page.tsx b/src/app/(auth)/register/page.tsx
index 8dc959c..81cb7ae 100644
--- a/src/app/(auth)/register/page.tsx
+++ b/src/app/(auth)/register/page.tsx
@@ -19,8 +19,11 @@ import {
   FormControlLabel,
   FormGroup,
   Link,
+  Dialog,
+  DialogContent,
+  DialogActions,
 } from '@mui/material';
-import { ArrowBack, Visibility, VisibilityOff } from '@mui/icons-material';
+import { ArrowBack, Visibility, VisibilityOff, CheckCircle } from '@mui/icons-material';
 import { useState, useEffect, Suspense } from 'react';
 import { useUIStore } from '@/stores/uiStore';
 import { useAuthStore } from '@/stores/authStore';
@@ -90,6 +93,7 @@ function RegisterForm() {
   const [errors, setErrors] = useState<Record<string, string>>({});
   const [isVerifyingBusinessNumber, setIsVerifyingBusinessNumber] = useState(false);
   const [isBusinessNumberVerified, setIsBusinessNumberVerified] = useState(false);
+  const [successDialogOpen, setSuccessDialogOpen] = useState(false);
 
   // step 변경 시 URL 업데이트
   useEffect(() => {
@@ -224,8 +228,7 @@ function RegisterForm() {
       };
 
       login(mockUser, 'mock-jwt-token');
-      showToast('회원가입이 완료되었습니다!', 'success');
-      router.push('/');
+      setSuccessDialogOpen(true);
     } catch {
       showToast('회원가입에 실패했습니다. 다시 시도해주세요.', 'error');
     } finally {
@@ -233,6 +236,11 @@ function RegisterForm() {
     }
   };
 
+  const handleSuccessDialogClose = () => {
+    setSuccessDialogOpen(false);
+    router.push('/');
+  };
+
   return (
     <Box
       sx={{
@@ -636,6 +644,33 @@ function RegisterForm() {
           </Box>
         )}
       </Paper>
+
+      {/* 회원가입 완료 다이얼로그 */}
+      <Dialog open={successDialogOpen} onClose={handleSuccessDialogClose} maxWidth="xs" fullWidth>
+        <DialogContent sx={{ textAlign: 'center', py: 6, px: 4 }}>
+          <CheckCircle sx={{ fontSize: 80, color: 'success.main', mb: 2 }} />
+          <Typography variant="h5" sx={{ fontWeight: 700, mb: 1 }}>
+            회원가입 완료!
+          </Typography>
+          <Typography variant="body1" color="text.secondary" sx={{ mb: 2 }}>
+            <strong>{formData.name}</strong>님, 환영합니다!
+          </Typography>
+          <Typography variant="body2" color="text.secondary">
+            이제 KT AI 이벤트 마케팅 서비스를<br />
+            이용하실 수 있습니다
+          </Typography>
+        </DialogContent>
+        <DialogActions sx={{ justifyContent: 'center', pb: 3 }}>
+          <Button
+            variant="contained"
+            size="large"
+            onClick={handleSuccessDialogClose}
+            sx={{ minWidth: 200, py: 1.5, fontSize: 16, fontWeight: 600 }}
+          >
+            시작하기
+          </Button>
+        </DialogActions>
+      </Dialog>
     </Box>
   );
 }