Patent ID: 7775973

Claim:
An endoscope system comprising: an endoscope; and an endoscopic accessory, the endoscope including: an elongated insertion portion insertable from a distal end thereof into a body cavity; an operating portion connected to a proximal end of the insertion portion; a channel provided at the insertion portion and the operating portion, of which a distal end forms a distal opening at the distal end of the insertion portion, of which a proximal end forms a proximal opening at the operating portion, and used for at least suction; and a suction duct provided at the operating portion, of which a distal end forms a suction opening at the operating portion, and of which a proximal end is connected to a suction device, and the endoscopic accessory including: an elongated accessory insertion portion insertable from a distal end thereof into the body cavity; a treatment portion provided at the distal end of the accessory insertion portion and to separate a part of a living tissue therefrom; and a capture portion to be connected to the accessory insertion portion and detachably attached to the operating portion of the endoscope, and the capture portion including: a communication path to communicate the proximal opening with the suction opening when the capture portion is attached to the endoscope; and a capture unit interposed in the communication path and to capture the tissue being sucked from the channel into the suction duct.