diff --git a/API/app/infrastructure/database/models/appeals.py b/API/app/infrastructure/database/models/appeals.py
new file mode 100644
index 0000000..1fca48e
--- /dev/null
+++ b/API/app/infrastructure/database/models/appeals.py
@@ -0,0 +1,32 @@
+from enum import Enum as PyEnum
+
+from sqlalchemy import Column, Integer, String, DateTime, Enum, ForeignKey
+from sqlalchemy.orm import relationship
+from sqlalchemy.sql import func
+
+from app.infrastructure.database.models import Base
+
+
+class AppealStatusEnum(PyEnum):
+    NEW = 'новое'
+    IN_PROGRESS = 'в работе'
+    WAITING_FOR_USER_RESPONSE = 'ожидание ответа пользователя'
+    WAITING_FOR_SPECIALIST_RESPONSE = 'ожидание ответа специалиста'
+    RESOLVED = 'решено'
+    CLOSED = 'закрыто'
+    REJECTED = 'отклонено'
+
+
+class Appeal(Base):
+    __tablename__ = 'appeals'
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    message = Column(String, nullable=False)
+    created_date = Column(DateTime, nullable=False, default=func.utcnow)
+    status = Column(Enum(AppealStatusEnum), nullable=False, default=AppealStatusEnum.NEW)
+
+    topic_id = Column(Integer, ForeignKey('appeals_topics.id'), nullable=False)
+    user_id = Column(Integer, ForeignKey('users.id'), nullable=False)
+
+    topic = relationship('AppealsTopic', back_populates='appeals')
+    user = relationship('User', back_populates='appeals')
diff --git a/API/app/infrastructure/database/models/appeals_topics.py b/API/app/infrastructure/database/models/appeals_topics.py
new file mode 100644
index 0000000..cf2e32e
--- /dev/null
+++ b/API/app/infrastructure/database/models/appeals_topics.py
@@ -0,0 +1,13 @@
+from sqlalchemy import Column, Integer, VARCHAR
+from sqlalchemy.orm import relationship
+
+from app.infrastructure.database.models import Base
+
+
+class AppealsTopic(Base):
+    __tablename__ = 'appeals_topics'
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    title = Column(VARCHAR(500), nullable=False)
+
+    appeals = relationship('Appeal', back_populates='topic')
diff --git a/API/app/infrastructure/database/models/categories.py b/API/app/infrastructure/database/models/categories.py
new file mode 100644
index 0000000..bca2a3f
--- /dev/null
+++ b/API/app/infrastructure/database/models/categories.py
@@ -0,0 +1,14 @@
+from sqlalchemy import Column, Integer, VARCHAR, String
+from sqlalchemy.orm import relationship
+
+from app.infrastructure.database.models import Base
+
+
+class Category(Base):
+    __tablename__ = 'categories'
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    title = Column(VARCHAR(200), nullable=False)
+    description = Column(String, nullable=False)
+
+    courses = relationship('Course', back_populates='category')
diff --git a/API/app/infrastructure/database/models/course_students.py b/API/app/infrastructure/database/models/course_students.py
new file mode 100644
index 0000000..c7030ff
--- /dev/null
+++ b/API/app/infrastructure/database/models/course_students.py
@@ -0,0 +1,20 @@
+from sqlalchemy import Column, Integer, VARCHAR, String, ForeignKey, Date, Boolean
+from sqlalchemy.sql import func
+from sqlalchemy.orm import relationship
+
+from app.infrastructure.database.models import Base
+
+
+class CourseStudent(Base):
+    __tablename__ = 'course_students'
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    enrollment_date = Column(Date, nullable=False, default=func.utcnow)
+    is_finished = Column(Boolean, nullable=False, default=False)
+
+    course_id = Column(Integer, ForeignKey('courses.id'), nullable=False)
+    user_id = Column(Integer, ForeignKey('users.id'), nullable=False)
+
+    course = relationship('Course', back_populates='students')
+    user = relationship('User', back_populates='enrolled_courses')
+
diff --git a/API/app/infrastructure/database/models/courses.py b/API/app/infrastructure/database/models/courses.py
new file mode 100644
index 0000000..4a6ccd2
--- /dev/null
+++ b/API/app/infrastructure/database/models/courses.py
@@ -0,0 +1,20 @@
+from sqlalchemy import Column, Integer, VARCHAR, String, ForeignKey
+from sqlalchemy.orm import relationship
+
+from app.infrastructure.database.models import Base
+
+
+class Course(Base):
+    __tablename__ = 'courses'
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    title = Column(VARCHAR(200), nullable=False)
+    description = Column(String, nullable=False)
+
+    category_id = Column(Integer, ForeignKey('categories.id'), nullable=False)
+    owner_user_id = Column(Integer, ForeignKey('users.id'), nullable=False)
+
+    category = relationship('Category', back_populates='courses')
+    owner_user = relationship('User', back_populates='owned_courses')
+
+    students = relationship('CourseStudent', back_populates='course')
diff --git a/API/app/infrastructure/database/models/roles.py b/API/app/infrastructure/database/models/roles.py
index fa9787b..e9435a0 100644
--- a/API/app/infrastructure/database/models/roles.py
+++ b/API/app/infrastructure/database/models/roles.py
@@ -9,3 +9,5 @@ class Role(Base):
 
     id = Column(Integer, primary_key=True, autoincrement=True)
     title = Column(VARCHAR(100), nullable=False)
+
+    users = relationship('User', back_populates='role')
diff --git a/API/app/infrastructure/database/models/users.py b/API/app/infrastructure/database/models/users.py
index 1d128b1..0498078 100644
--- a/API/app/infrastructure/database/models/users.py
+++ b/API/app/infrastructure/database/models/users.py
@@ -1,13 +1,12 @@
-import datetime
-
-from sqlalchemy import Column, Integer, VARCHAR, Enum, DateTime, Date, String
-from sqlalchemy.sql import func
-
 from enum import Enum as PyEnum
 
-from app.infrastructure.database.models import Base
+from sqlalchemy import Column, Integer, VARCHAR, Enum, DateTime, Date, String, ForeignKey
+from sqlalchemy.orm import relationship
+from sqlalchemy.sql import func
 from werkzeug.security import check_password_hash, generate_password_hash
 
+from app.infrastructure.database.models import Base
+
 
 class UserGenderEnum(PyEnum):
     MALE = 'мужской'
@@ -29,6 +28,14 @@ class User(Base):
     password = Column(String, nullable=False)
     email = Column(VARCHAR(200), nullable=False)
 
+    role_id = Column(Integer, ForeignKey('roles.id'), nullable=False)
+
+    role = relationship('Role', back_populates='users')
+
+    appeals = relationship('Appeal', back_populates='user')
+    owned_courses = relationship('Course', back_populates='owned_courses')
+    enrolled_courses = relationship('CourseStudent', back_populates='user')
+
     def check_password(self, password):
         return check_password_hash(self.password, password)