Abstract: This invention provides an endoscopic treatment system for executing at least one of localized injection through mucous membrane, peeling off and cutting off of mucous membrane. This system has an endoscope, which has an insertion section provided with at least one channel extending therein. The system also has a plurality of treatment tools including a syringe needle for executing localized injection through a portion of mucous membrane, forceps for gripping a portion of mucous membrane, and at least one knife for executing at least one of peeling off and cutting off of mucous membrane. Further, this system includes an endoscopic guide tube to be inserted into the esophagus, which has a main channel for inserting therein the endoscope, and at least one sub channel for inserting therein each of the treatment tools.

Abstract: A disposable medical instrument wherein at least part of the portion which does not directly contact the mucosa in body cavities is composed of a material containing hydrophilic polymer such as water soluble polymer or water absorptive polymer.