diff --git a/KNU_MUSEUM/src/main/webapp/join.html b/KNU_MUSEUM/src/main/webapp/join.html
index efa75cf..c08d21f 100644
--- a/KNU_MUSEUM/src/main/webapp/join.html
+++ b/KNU_MUSEUM/src/main/webapp/join.html
@@ -61,7 +61,7 @@ <h2 class="text-center mb-4">회원가입</h2>
 				<input type="email" class="form-control" id="email" name="email" placeholder="이메일을 입력해 주세요" required>
 			</div>
 			<div class="col-12">
-				<input type="text" class="form-control" id="phonenumber" name="phoneNumber" placeholder="휴대폰 번호를 '-'없이 입력해주세요." required>
+				<input type="text" class="form-control" id="phonenumber" name="phoneNumber" placeholder="휴대폰 번호를 '-'를 포함하여 입력해주세요." required>
 			</div>
 			<div class="d-grid gap-2 col-6 mx-auto">
 				<button class="btn btn-secondary" type="submit">회원가입</button>