A medical suturing and ligating apparatus is provided which enable to cut a suturing and ligating member such as a ligating wire in a simple manner while preventing a holding member from being removed from a flexible sheath. When a slider 32 pulls a ligating wire 18 toward the proximal end of an inner sheath 7 so as to suture or ligate a living tissue with the ligating wire 18 when a wire holding member is in abutting contact with the distal end of the inner sheath 7, a fixing screw 40 engages with an engaging recessed portion 41. As a result, the slider 32 is fixedly held on an operating section body 31. Accordingly, it is possible to maintain the state in which the wire holding member is in abutting contact with the distal end of the inner sheath.