diff --git a/src/main/java/com/example/demo/app/domain/service/LoginService.java b/src/main/java/com/example/demo/app/domain/service/LoginService.java
new file mode 100644
index 0000000..4908194
--- /dev/null
+++ b/src/main/java/com/example/demo/app/domain/service/LoginService.java
@@ -0,0 +1,9 @@
+package com.example.demo.app.domain.service;
+
+import com.example.demo.app.infra.entity.UserEntity;
+
+public interface LoginService {
+
+	UserEntity login(String mailAddress, String password);
+}
+
diff --git a/src/main/java/com/example/demo/app/domain/service/impl/LoginServiceImpl.java b/src/main/java/com/example/demo/app/domain/service/impl/LoginServiceImpl.java
new file mode 100644
index 0000000..ac41c21
--- /dev/null
+++ b/src/main/java/com/example/demo/app/domain/service/impl/LoginServiceImpl.java
@@ -0,0 +1,25 @@
+package com.example.demo.app.domain.service.impl;
+
+import org.springframework.stereotype.Service;
+
+import com.example.demo.app.domain.service.LoginService;
+import com.example.demo.app.infra.entity.UserEntity;
+import com.example.demo.app.infra.repository.UserRepository;
+
+import lombok.RequiredArgsConstructor;
+
+@Service
+@RequiredArgsConstructor
+public class LoginServiceImpl implements LoginService {
+
+    private final UserRepository userRepository;
+
+    @Override
+    public UserEntity login(String mailAddress, String password) {
+
+        return userRepository.findByMailAddressAndPassword(
+                mailAddress,
+                password).orElse(null);
+    }
+}
+
diff --git a/src/main/java/com/example/demo/app/infra/entity/UserEntity.java b/src/main/java/com/example/demo/app/infra/entity/UserEntity.java
new file mode 100644
index 0000000..332fb61
--- /dev/null
+++ b/src/main/java/com/example/demo/app/infra/entity/UserEntity.java
@@ -0,0 +1,76 @@
+package com.example.demo.app.infra.entity;
+
+import java.time.LocalDate;
+import java.util.List;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.OneToMany;
+import jakarta.persistence.OneToOne;
+import jakarta.persistence.Table;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Entity
+@Table(name = "user_t")
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+public class UserEntity {
+
+	@Id
+	@GeneratedValue(strategy = GenerationType.IDENTITY)
+	@Column(name = "user_id")
+	private Long userId;
+
+	@Column(name = "user_name", nullable = false)
+	private String userName;
+
+	@Column(name = "mail_address", nullable = false)
+	private String mailAddress;
+
+	@Column(name = "password", nullable = false)
+	private String password;
+
+	@Column(name = "secret_answer", nullable = false)
+	private String secretQuestionAnswer;
+	
+	@Column(name = "birth_date", nullable = false)
+	private LocalDate birthDate;
+	
+	@Column(name = "saving", nullable = false)
+	private Integer saving;
+	
+	@Column(name = "annual_income", nullable = false)
+	private Integer annualIncome;
+	
+	@Column(name = "monthly_budget", nullable = false)
+	private Integer monthlyBudget;
+	
+	@Column(name = "delete_flag", nullable = false)
+	private Integer deleteFlag;
+
+	@OneToMany(mappedBy = "userEntity")
+	private List<TransactionEntity> transactionEntityList;
+	
+	@ManyToOne(fetch = FetchType.LAZY)
+	@JoinColumn(name = "secret_question_id")
+	private QuestionEntity questionEntity;
+	
+	@OneToOne(fetch = FetchType.LAZY)
+	@JoinColumn(name = "goal_id")
+	private GoalEntity goalEntity;
+	
+	@ManyToOne(fetch = FetchType.LAZY)
+	@JoinColumn(name = "course_id")
+	private CourseEntity courseEntity;
+	
+}
diff --git a/src/main/java/com/example/demo/app/infra/repository/UserRepository.java b/src/main/java/com/example/demo/app/infra/repository/UserRepository.java
new file mode 100644
index 0000000..4627b38
--- /dev/null
+++ b/src/main/java/com/example/demo/app/infra/repository/UserRepository.java
@@ -0,0 +1,15 @@
+package com.example.demo.app.infra.repository;
+
+import java.util.Optional;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+import com.example.demo.app.infra.entity.UserEntity;
+
+@Repository
+public interface UserRepository extends JpaRepository<UserEntity, Long> {
+
+    Optional<UserEntity> findByMailAddressAndPassword(String mailAddress, String password);
+}
+
diff --git a/src/main/java/com/example/demo/app/presentation/controller/LoginController.java b/src/main/java/com/example/demo/app/presentation/controller/LoginController.java
new file mode 100644
index 0000000..2e1439f
--- /dev/null
+++ b/src/main/java/com/example/demo/app/presentation/controller/LoginController.java
@@ -0,0 +1,55 @@
+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.ModelAttribute;
+import org.springframework.web.bind.annotation.PostMapping;
+
+import com.example.demo.app.domain.service.LoginService;
+import com.example.demo.app.infra.entity.UserEntity;
+import com.example.demo.app.presentation.form.LoginForm;
+
+import lombok.RequiredArgsConstructor;
+
+@Controller
+@RequiredArgsConstructor
+public class LoginController {
+
+    private final LoginService loginService;
+
+    @GetMapping("/login")
+    public String showLogin(Model model) {
+
+        model.addAttribute(
+                "loginForm",
+                new LoginForm());
+
+        return "login";
+    }
+
+    @PostMapping("/login")
+    public String login(
+            @ModelAttribute LoginForm loginForm,
+            Model model, HttpSession session) {
+
+        UserEntity loginUser = loginService.login(
+                loginForm.getMailAddress(),
+                loginForm.getPassword());
+
+        if (loginUser == null) {
+            model.addAttribute(
+                    "errorMessage",
+                    "Email address or password is incorrect.");
+
+            return "login";
+        }
+
+        session.setAttribute("loginUser", loginUser);
+
+        return "menu";
+    }
+}
+
diff --git a/src/main/java/com/example/demo/app/presentation/form/LoginForm.java b/src/main/java/com/example/demo/app/presentation/form/LoginForm.java
new file mode 100644
index 0000000..c2f7a92
--- /dev/null
+++ b/src/main/java/com/example/demo/app/presentation/form/LoginForm.java
@@ -0,0 +1,15 @@
+package com.example.demo.app.presentation.form;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+public class LoginForm {
+
+    private String mailAddress;
+    private String password;
+}
+
diff --git a/src/main/resources/templates/login.html b/src/main/resources/templates/login.html
new file mode 100644
index 0000000..7050ca1
--- /dev/null
+++ b/src/main/resources/templates/login.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<html lang="ja"xmlns:th="http://www.thymeleaf.org">
+<head>
+<meta charset="UTF-8">
+<title>ログイン</title>
+</head>
+<body>
+	<header></header>
+	
+	<main>
+		<h1>ログイン</h1>
+		
+		<div th:if="${errorMessage}" th:text="${errorMessage}"></div>
+		<form th:action="@{/login}" th:object="${loginForm}" method="post">
+			<div>
+				<label for="emailAddress">メールアドレス</label>
+				
+				<input type="email"
+				id="emailAddress"
+				th:field="{emailAddress}"
+				required>
+			</div>
+			
+			<div>
+				<label for="password">パスワード</label>
+				
+				<input type="password"
+				id="password"
+				th:field="{password}"
+				required>
+			</div>
+			
+			<div>
+				<button type="submit">ログイン</button>
+			</div>
+		</form>
+		
+		<div>
+			<a href="@{user/register}">新規会員登録</a>
+		</div>
+		
+		<div>
+			<a href="@{password/authentication}">パスワードを忘れた方</a>
+		</div>
+	</main>
+</body>
+</html>
\ No newline at end of file