Suction catheter of the present invention includes a catheter body (10) having a suction passage along the longitudinal direction (12), the operation unit and the operative part of which is attached to the opposite end of the catheter body (10) and (20), It and an imaging unit (30) is detachable from the operation unit (20).本発明の吸引カテーテルは、長手方向に沿う吸引通路(12)を有するカテーテル本体(10)と、前記カテーテル本体(10)の術部とは反対の端部に取り付けた操作部(20)と、前記操作部(20)に対して着脱可能である撮像部(30)とを備える。