An expandable apparatus for medical treatment is provided. The expandable apparatus includes an expandable member, an air tube, a connector, a main body, a front cap and a long needle. The air tube guides air into the expandable member. The connector is coupled to the air tube to guide air into the air tube. The main body is coupled to the connector and includes an air inlet pipe into which the air for expanding the expandable member is supplied. The front cap is coupled to the main body such that the main body supports the connector. The front cap protects a junction between the air tube and the connector. The long needle extends from a rear end of the main body to the expandable member. The long needle supports the expandable member and the air tube. A marker is integrally provided on the long needle corresponding to a position of the expandable member.
