Patent ID: 7662089

Claim:
An endoscope for treatment suitable for treatment in a body cavity, comprising: an elongate flexible observing optical unit having at least an observing optical system; and a unit inserting tool having a unit inserting channel in which the observing optical unit is inserted and a treatment tool inserting channel in which a treatment tool is inserted, wherein the unit inserting channel of the unit inserting tool has a branching portion at which the unit inserting channel is branched into a first inserting channel and a second inserting channel, an observing window located in an opening at the end of the first inserting channel is provided at a surface of the distal end portion of the unit inserting channel, and an observing window located in an opening at the end of the second inserting channel is provided at a surface at a halfway portion of the unit inserting channel, and wherein the unit inserting tool comprises an optical unit lead-in port to lead in the observing optical unit and at least one treatment tool lead-in port in which the treatment tool is inserted at the proximal end portion thereof, and a treatment tool lead-out port communicated with the treatment tool inserting channel extended from the treatment tool lead-in port at at least one of the surface of the distal end portion of the unit inserting channel and the surface at the halfway portion of the unit inserting channel.