diff --git a/src/main/java/shop/cazait/domain/auth/dto/UserAuthenticateInDTO.java b/src/main/java/shop/cazait/domain/auth/dto/UserAuthenticateInDTO.java
index c3f0a3ef..9b4ab034 100644
--- a/src/main/java/shop/cazait/domain/auth/dto/UserAuthenticateInDTO.java
+++ b/src/main/java/shop/cazait/domain/auth/dto/UserAuthenticateInDTO.java
@@ -15,7 +15,7 @@
 @Getter
 public class UserAuthenticateInDTO {
 
-    @Pattern(regexp = "^[a-z0-9]{5,20}$")
+    @Pattern(regexp = "^(?!\\d+$)[a-z\\d]{5,20}$", message = "올바른 아이디 형식이 아닙니다")
     @NotBlank
     @Schema(description = "로그인 아이디", example = "cazait1234")
     private String accountName;
diff --git a/src/main/java/shop/cazait/domain/user/dto/request/UserCreateInDTO.java b/src/main/java/shop/cazait/domain/user/dto/request/UserCreateInDTO.java
index e6423818..88ffe740 100644
--- a/src/main/java/shop/cazait/domain/user/dto/request/UserCreateInDTO.java
+++ b/src/main/java/shop/cazait/domain/user/dto/request/UserCreateInDTO.java
@@ -13,7 +13,7 @@
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
 public class UserCreateInDTO {
 
-    @Pattern(regexp = "^[a-z0-9]{5,20}$", message = "올바른 아이디 형식이 아닙니다")
+    @Pattern(regexp = "^(?!\\d+$)[a-z\\d]{5,20}$", message = "올바른 아이디 형식이 아닙니다")
     @NotBlank
     @Schema(description = "로그인 아이디", example = "cazait1234")
     private String accountName;
diff --git a/src/main/java/shop/cazait/domain/user/dto/request/UserFindExistAccountNameInDTO.java b/src/main/java/shop/cazait/domain/user/dto/request/UserFindExistAccountNameInDTO.java
index b7719aea..afd45661 100644
--- a/src/main/java/shop/cazait/domain/user/dto/request/UserFindExistAccountNameInDTO.java
+++ b/src/main/java/shop/cazait/domain/user/dto/request/UserFindExistAccountNameInDTO.java
@@ -16,6 +16,7 @@
 public class UserFindExistAccountNameInDTO {
 
 
+    @Pattern(regexp = "^(?!\\d+$)[a-z\\d]{5,20}$", message = "올바른 아이디 형식이 아닙니다")
     @NotBlank
     @Schema(description = "로그인 아이디", example = "cazait1234")
     private String accountName;