diff --git a/book-rent/src/main/java/com/example/demo/controller/LoginController.java b/book-rent/src/main/java/com/example/demo/controller/LoginController.java
index 5880c4f..4f790ca 100644
--- a/book-rent/src/main/java/com/example/demo/controller/LoginController.java
+++ b/book-rent/src/main/java/com/example/demo/controller/LoginController.java
@@ -1,5 +1,39 @@
+// package宣言（チームの構成に合わせる）
 package com.example.demo.controller;
 
+import jakarta.validation.Valid;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.validation.BindingResult;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.ModelAttribute;
+import org.springframework.web.bind.annotation.PostMapping;
+
+@Controller
 public class LoginController {
 
+    // ログイン画面表示
+    @GetMapping("/login")
+    public String showLogin(Model model) {
+        model.addAttribute("loginInfoForm", new LoginInfoForm());
+        return "login";
+    }
+
+    // ログイン処理
+    @PostMapping("/doLogin")
+    public String doLogin(
+            @Valid @ModelAttribute("loginInfoForm")
+            LoginInfoForm form,
+            BindingResult result) {
+
+        // 入力チェックでエラーがあればログイン画面に戻る
+        if (result.hasErrors()) {
+            return "login";
+        }
+
+        // ここから社員情報の検索・認証処理を追加する
+
+        return "login";
+    }
 }
diff --git a/book-rent/src/main/resources/templates/login.html b/book-rent/src/main/resources/templates/login.html
index 6ee30de..44aaf6e 100644
--- a/book-rent/src/main/resources/templates/login.html
+++ b/book-rent/src/main/resources/templates/login.html
@@ -25,12 +25,15 @@
               method="post"
               th:object="${loginInfoForm}">
 
-            <!-- エラーメッセージ -->
-            <div class="msgBox error"
-                 th:if="${messageError != null}">
-                <span class="error"
-                      th:text="${messageError.message}"></span>
-            </div>
+			  <!-- Validationエラーメッセージ -->
+			  <div class="msgBox error"
+			       th:if="${#fields.hasErrors('*')}">
+
+			      <p th:each="err : ${#fields.errors('*')}"
+			         th:text="${err}">
+			      </p>
+
+			  </div>
 
             <table>
                 <!-- メールアドレス -->