diff --git a/src/main/java/com/example/demo/app/domain/model/AuthenticationModel.java b/src/main/java/com/example/demo/app/domain/model/AuthenticationModel.java
new file mode 100644
index 0000000..ec8db4b
--- /dev/null
+++ b/src/main/java/com/example/demo/app/domain/model/AuthenticationModel.java
@@ -0,0 +1,10 @@
+package com.example.demo.app.domain.model;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+@Getter
+@AllArgsConstructor
+public class AuthenticationModel {
+    private Long userId;
+}
diff --git a/src/main/java/com/example/demo/app/domain/model/UserModel.java b/src/main/java/com/example/demo/app/domain/model/UserModel.java
index bb34609..1f79b0c 100644
--- a/src/main/java/com/example/demo/app/domain/model/UserModel.java
+++ b/src/main/java/com/example/demo/app/domain/model/UserModel.java
@@ -8,10 +8,9 @@ import lombok.Getter;
 @Getter
 @AllArgsConstructor
 public class UserModel {
-
     private Long userId;
     private String userName;
-    private String emailAddress;
+    private String mailAddress;
     private String password;
     private Integer secretQuestionId;
     private String secretAnswer;
@@ -19,7 +18,7 @@ public class UserModel {
     private Integer saving;
     private Integer annualIncome;
     private Integer monthlyBudget;
-    private Integer goalId;
-    private Integer courseId;
+    private Long goalId;
+    private Long courseId;
     private Integer deleteFlag;
 }
diff --git a/src/main/java/com/example/demo/app/domain/service/AuthenticationService.java b/src/main/java/com/example/demo/app/domain/service/AuthenticationService.java
new file mode 100644
index 0000000..824c752
--- /dev/null
+++ b/src/main/java/com/example/demo/app/domain/service/AuthenticationService.java
@@ -0,0 +1,9 @@
+package com.example.demo.app.domain.service;
+
+import com.example.demo.app.domain.model.AuthenticationModel;
+import com.example.demo.app.presentation.form.AuthenticationForm;
+
+public interface AuthenticationService {
+
+	AuthenticationModel authenticate(AuthenticationForm authenticationForm);
+}
diff --git a/src/main/java/com/example/demo/app/domain/service/impl/AuthenticationServiceImpl.java b/src/main/java/com/example/demo/app/domain/service/impl/AuthenticationServiceImpl.java
new file mode 100644
index 0000000..89ac9f4
--- /dev/null
+++ b/src/main/java/com/example/demo/app/domain/service/impl/AuthenticationServiceImpl.java
@@ -0,0 +1,42 @@
+package com.example.demo.app.domain.service.impl;
+
+import org.springframework.stereotype.Service;
+
+import com.example.demo.app.domain.model.AuthenticationModel;
+import com.example.demo.app.domain.service.AuthenticationService;
+import com.example.demo.app.infra.entity.UserEntity;
+import com.example.demo.app.infra.repository.UserRepository;
+import com.example.demo.app.presentation.form.AuthenticationForm;
+
+import lombok.RequiredArgsConstructor;
+
+@Service
+@RequiredArgsConstructor
+public class AuthenticationServiceImpl implements AuthenticationService {
+
+    private final UserRepository userRepository;
+
+    @Override
+    public AuthenticationModel authenticate(AuthenticationForm authenticationForm) {
+
+        UserEntity userEntity = userRepository.findByMailAddress(
+                authenticationForm.getMailAddress())
+                .orElse(null);
+
+        if (userEntity == null) {
+            return null;
+        }
+
+        if (!userEntity.getQuestionEntity().getSecretQuestionId()
+                .equals(authenticationForm.getSecretQuestionId())) {
+            return null;
+        }
+
+        if (!userEntity.getSecretQuestionAnswer()
+                .equals(authenticationForm.getSecretAnswer())) {
+            return null;
+        }
+
+        return new AuthenticationModel(userEntity.getUserId());
+    }
+}
diff --git a/src/main/java/com/example/demo/app/presentation/controller/AuthenticationController.java b/src/main/java/com/example/demo/app/presentation/controller/AuthenticationController.java
new file mode 100644
index 0000000..5cf8569
--- /dev/null
+++ b/src/main/java/com/example/demo/app/presentation/controller/AuthenticationController.java
@@ -0,0 +1,56 @@
+package com.example.demo.app.presentation.controller;
+
+import jakarta.servlet.http.HttpSession;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+
+import com.example.demo.app.domain.model.AuthenticationModel;
+import com.example.demo.app.domain.service.AuthenticationService;
+import com.example.demo.app.infra.repository.QuestionRepository;
+import com.example.demo.app.presentation.form.AuthenticationForm;
+
+import lombok.RequiredArgsConstructor;
+
+@Controller
+@RequiredArgsConstructor
+public class AuthenticationController {
+
+    private final AuthenticationService authenticationService;
+    private final QuestionRepository questionRepository;
+
+    @GetMapping("/authentication")
+    public String showAuthentication(Model model) {
+
+        model.addAttribute("authenticationForm", new AuthenticationForm());
+        model.addAttribute("questionList", questionRepository.findAll());
+
+        return "authentication";
+    }
+
+    @PostMapping("/authentication")
+    public String authenticate(
+            AuthenticationForm authenticationForm,
+            Model model,
+            HttpSession session) {
+
+    	AuthenticationModel authenticationModel =
+    	        authenticationService.authenticate(authenticationForm);
+
+    	if (authenticationModel == null) {
+    	    model.addAttribute("errorMessage", "認証情報が正しくありません。");
+    	    model.addAttribute("questionList", questionRepository.findAll());
+
+    	    return "authentication";
+    	}
+
+    	session.setAttribute(
+    	        "passwordResetUserId",
+    	        authenticationModel.getUserId());
+
+    	return "password_reset";
+
+    }
+}
diff --git a/src/main/java/com/example/demo/app/presentation/form/AuthenticationForm.java b/src/main/java/com/example/demo/app/presentation/form/AuthenticationForm.java
new file mode 100644
index 0000000..2c27a5d
--- /dev/null
+++ b/src/main/java/com/example/demo/app/presentation/form/AuthenticationForm.java
@@ -0,0 +1,14 @@
+package com.example.demo.app.presentation.form;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+public class AuthenticationForm {
+    private String mailAddress;
+    private Integer secretQuestionId;
+    private String secretAnswer;
+}
diff --git a/src/main/resources/templates/Authentication.html b/src/main/resources/templates/Authentication.html
new file mode 100644
index 0000000..336b3cc
--- /dev/null
+++ b/src/main/resources/templates/Authentication.html
@@ -0,0 +1,53 @@
+<!DOCTYPE html>
+<html xmlns:th="http://www.thymeleaf.org">
+
+<head>
+	<meta charset="UTF-8">
+	<title>認証</title>
+</head>
+
+<body>
+	<main>
+		<h1>本人認証確認</h1>
+	
+		<form th:action="@{/authentication}" th:object="${authenticationForm}" method="post">
+	
+			<div>
+				<label for="mailAddress">メールアドレス</label>
+				<input type="email" id="mailAddress" th:field="*{mailAddress}">
+			</div>
+	
+			<div>
+				<label for="secretQuestionId">秘密の質問</label>
+				<select id="secretQuestionId" th:field="*{secretQuestionId}">
+	
+					<option value="">選択してください</option>
+	
+					<option th:each="question : ${questionList}" th:value="${question.secretQuestionId}"
+						th:text="${question.questionText}">
+					</option>
+	
+				</select>
+			</div>
+	
+			<div>
+				<label for="secretAnswer">秘密の質問の回答</label>
+				<input type="text" id="secretAnswer" th:field="*{secretAnswer}">
+			</div>
+	
+			<button type="submit">確認</button>
+	
+		</form>
+		
+		<form th:action="@{/login}" method="get">
+			<button type="submit">戻る</button>
+		</form>
+	</main>
+	
+	<script th:if="${errorMessage}" th:inline="javascript">
+	    alert(/*[[${errorMessage}]]*/);
+	</script>
+	
+</body>
+
+</html>
\ No newline at end of file