diff --git a/getcloser/.gitignore b/getcloser/.gitignore
new file mode 100644
index 0000000..524bf12
--- /dev/null
+++ b/getcloser/.gitignore
@@ -0,0 +1,75 @@
+node_modules
+.vite
+
+
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+*.manifest
+*.spec
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+.hypothesis/
+.pytest_cache/
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# IDE
+.vscode/
+.cursor/
+.idea/
+*.swp
+*.swo
+*~
+
+# OS
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+ehthumbs.db
+Thumbs.db
+
+# Logs
+*.log
+
+# Temporary files
+*.tmp
+*.temp
diff --git a/getcloser/backend/app/api/v1/__init__.py b/getcloser/backend/app/api/v1/__init__.py
index 0d9db47..0cad476 100644
--- a/getcloser/backend/app/api/v1/__init__.py
+++ b/getcloser/backend/app/api/v1/__init__.py
@@ -1,5 +1,7 @@
 from api.v1.users import users
+from api.v1.teams import teams
 from fastapi import APIRouter
 
 api_router = APIRouter()
 api_router.include_router(users.router, prefix="/users", tags=["users"])
+api_router.include_router(teams.router, prefix="/teams", tags=["teams"])
diff --git a/getcloser/backend/app/api/v1/teams/teams.py b/getcloser/backend/app/api/v1/teams/teams.py
new file mode 100644
index 0000000..aa7e6e8
--- /dev/null
+++ b/getcloser/backend/app/api/v1/teams/teams.py
@@ -0,0 +1,11 @@
+from fastapi import APIRouter, Depends
+from sqlalchemy.orm import Session
+from core.database import get_db
+from schemas.team_schema import TeamCreateRequest, TeamResponse
+from services.team_service import create_team
+
+router = APIRouter()
+
+@router.post("/create", response_model=TeamResponse)
+def create_team_route(req: TeamCreateRequest, db: Session = Depends(get_db)):
+    return create_team(db, req)
diff --git a/getcloser/backend/app/models/teams.py b/getcloser/backend/app/models/teams.py
new file mode 100644
index 0000000..83073f4
--- /dev/null
+++ b/getcloser/backend/app/models/teams.py
@@ -0,0 +1,14 @@
+from core.database import Base
+from sqlalchemy import Column, Integer, UniqueConstraint
+
+
+class Team(Base):
+  __tablename__ = "teams"
+  
+  id = Column(Integer, primary_key=True, index=True)
+  team_id = Column(Integer, index=True)
+  user_id = Column(Integer, unique=True, index=True)
+
+  __table_args__ = (
+        UniqueConstraint('team_id', 'user_id', name='_team_user_uc'),
+    )
diff --git a/getcloser/backend/app/schemas/team_schema.py b/getcloser/backend/app/schemas/team_schema.py
new file mode 100644
index 0000000..a8aff3a
--- /dev/null
+++ b/getcloser/backend/app/schemas/team_schema.py
@@ -0,0 +1,12 @@
+from pydantic import BaseModel, Field
+from typing import List
+
+
+class TeamCreateRequest(BaseModel):
+    my_id: int
+    member_ids: List[int] = Field(..., min_items=4, max_items=4, description="팀원 4명의 ID")
+
+
+class TeamResponse(BaseModel):
+    team_id: int
+    members_ids: List[int]
diff --git a/getcloser/backend/app/services/team_service.py b/getcloser/backend/app/services/team_service.py
new file mode 100644
index 0000000..8315702
--- /dev/null
+++ b/getcloser/backend/app/services/team_service.py
@@ -0,0 +1,27 @@
+from sqlalchemy.orm import Session
+from models.teams import Team
+from schemas.team_schema import TeamCreateRequest, TeamResponse
+from fastapi import HTTPException
+
+def create_team(db: Session, req: TeamCreateRequest) -> TeamResponse:
+    all_ids = [req.my_id] + req.member_ids
+
+    existing = db.query(Team).filter(Team.user_id.in_(all_ids)).all()
+    if existing:
+        raise HTTPException(status_code=400, detail="Some users are already in a team.")
+
+    last_team = (
+        db.query(Team)
+        .order_by(Team.team_id.desc())
+        .with_for_update()
+        .first()
+    )
+
+    new_team_id = (last_team.team_id + 1) if last_team else 1
+
+    for uid in all_ids:
+        db.add(Team(team_id=new_team_id, user_id=uid))
+    
+    db.commit()
+
+    return TeamResponse(team_id=new_team_id, members_ids=all_ids)