A handpiece for treatment according to an embodiment of the present invention comprises: a housing in which at least one through hole is formed at a tip end； an insertion part which penetrates a surface of a tissue to be inserted into the tissue while at least a part thereof is exposed through the through hole； and a cooling channel providing cooling gas supplied to the surface of the tissue through the through hole. According to the present invention, excessive temperature rise of a tissue under treatment can be prevented.COPYRIGHT KIPO 2020본 발명의 실시예에 따른 치료용 핸드피스는, 선단에 적어도 하나의 관통홀이 형성된 하우징, 상기 관통홀을 통해 적어도 일부가 노출된 상태에서 조직 표면을 관통하여 조직 내부로 삽입되는 삽입부 및 상기 관통홀을 통해 상기 조직 표면으로 공급되는 냉각 가스를 제공하는 냉각 채널을 포함한다.
