An endoscopic treatment tool includes: a tubular insertion part; a stopper having a through hole and provided at a distal end part of the insertion part; a manipulation wire inserted through the insertion part; a treatment part provided at a distal end part of the manipulation wire and inserted through the through hole; and a restriction member provided closer to a proximal end side than the stopper and connecting the treatment part and the manipulation wire. When the restriction member is pressed against the stopper, the treatment part is locked not to be rotated about an axis of the insertion part with respect to the insertion part, and an opening causing a fluid to flow from an inside of the insertion part to the through hole is formed on an outer peripheral surface of the restriction member.