An organic tissue sampling device capable of preventing a pressure in a body cavity from being increased beyond a prescribed pressure, comprising a holding part (33) and an insertion part (32) inserted into the body cavity. Also, the organic tissue sampling device comprises an air feed tube (34) feeding a prescribed gas into the insertion part (32) for discharging the prescribed gas from an opening part (35a) formed in the insertion part (32) and a clearance (38f) for releasing the prescribed gas fed into the body cavity.
