Patent ID: 7591782

Claim:
An endoscope and a balloon, including a balloon attaching jig that is used to attach the balloon having an inflation part and a fixing part to an insertion portion of the endoscope or an insertion aid that aids in insertion of the insertion portion into a body cavity by inserting the insertion portion or the insertion aid into an attaching hole of the balloon formed at the fixing part, the jig comprising: a ring member having an inside diameter larger than an outside diameter of the insertion portion of the insertion aid; a plurality of guide pieces that are integrally formed with the ring member or have a base end portion fixed to the ring member; a guide portion that is inserted into the attaching hole of the balloon and into which the insertion portion or the insertion aid is inserted, wherein the diameter of the guide portion can expand and contract freely, and the plurality of guide pieces are formed longer than the fixing part of the balloon so that a distal end of the guide pieces come to rest within the inflation part when the jig is fully inserted into the attaching hole of the balloon.