diff --git a/app/models/issue.py b/app/models/issue.py
index 5897506..52cffbb 100644
--- a/app/models/issue.py
+++ b/app/models/issue.py
@@ -64,3 +64,16 @@ class Issue(Base):
     # Relations
     organization = relationship("Organization", back_populates="issues")
     integration = relationship("Integration", back_populates="issues")
+    comments = relationship("IssueComment", back_populates="issue", cascade="all, delete-orphan")
+
+class IssueComment(Base):
+    __tablename__ = "issue_comments"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    issue_id = Column(Integer, ForeignKey("issues.id"), nullable=False)
+    user_id = Column(Integer, ForeignKey("users.id"), nullable=True)
+    content = Column(Text, nullable=False)
+    created_at = Column(DateTime, default=datetime.utcnow)
+    
+    # Relations
+    issue = relationship("Issue", back_populates="comments")