Patent ID: 8382661

Claim:
An endoscope sucking operation apparatus comprising: a suction duct valve portion that opens a suction duct when a pushing operation is performed with respect to a suction button of an endoscope operating portion; a piston body which closes the suction duct valve portion when urged in a pushing operation direction of the suction button and opens the suction duct valve portion when moved toward the suction button side from a closing position; and an inversion movement mechanism that cooperates with the pushing operation of the suction button and moves the piston body in a direction opposite to the pushing operation direction, wherein the inversion movement mechanism comprises an inversion lever that performs a seesaw operation arranged coaxially with an axis of the suction button in an operating direction, and an operation end of the suction button is coupled with one end of the inversion lever whilst an operation end of the piston body is coupled with the other end of the inversion lever, wherein an axis of the suction button in the operating direction is arranged to be substantially coaxial with an axis of the piston body, and wherein the suction duct valve portion is closed when the suction button is not operated, and the suction duct valve portion is moved in the direction opposite to the pushing operation direction against an urging force of the piston body to be opened when the pushing operation is performed with respect to the suction button.