For safely inserting a catheter into a chest cavity of a child or corpulent patient to be retained therein in cases particularly in which an amount of a discharged liquid is small while allowing a manual discharge operation with a compact size including no additional equipment and preventing an atmospheric air from proceeding into the chest cavity during a removal of a penetrating needle, a discharge equipment for medical procedure which equipment is formed by a connector cap and a storage bottle detachably connectable to each other and in which equipment a connector to be connected to the catheter retained in the patient, a check valve including an outer periphery covered by a protect cover and being openable only toward a storage bottle side, and a coupling device to the storage bottle are mounted on the connector cap, the storage bottle is a hollow container including an inlet port and a discharge port, a detachably connecting device for the connector cap is mounted on the inlet port, and a check valve openable only toward an exterior of the storage bottle is mounted on the discharge port, is provided.
