A movable body (16) is inserted retractably into a flexible tube (12) being able to be inserted into a channel of an endoscope. A treatment unit (18) has directivity projectable and retractable with respect to a far end portion of the flexible tube (12) by the movable body (16). The flexible tube (12) is raised by a treatment apparatus raiser provided on the channel of the endoscope. In this time, a direction control member (44) is raised together with the flexible tube by the treatment apparatus raiser, and the direction of the treatment unit (18) is adjusted.
