Mucous membrane elevation instrument for endoscope and endoscope treatment system

The invention discloses a mucous membrane elevation instrument for an endoscope and an endoscope treatment system. This mucous membrane elevation instrument for an endoscope comprises: an elevation part which is made to protrude from a distant end part of an endoscope, and has a push-up face with a prescribed width for elevating a tissue; a first support part which is disposed in the location of the protrusion from the distant end part of the endoscope and separated from an outer side face of the elevation part by a gap opened outwardly; and a second support part which is disposed in a location opposite to the first support part with respect to the first elevation part in a location upon the protrusion from the distant end part of the endoscope and separated from the outer side face of the elevation part by a gap opened outwardly. The first support part and the second support part further comprise a push-down face having a prescribed width for pushing down peripheral tissues of the tissue which is pushed up b