Provided is a forceps device including: an elongated body portion； a pair of gripping pieces that are provided at a distal end of the body portion, at least one of which possesses conductivity； a motive-power output portion that is provided at a base end of the body portion； a motive-power converting mechanism that connects the pair of gripping pieces and the motive-power output portion, and that converts motive power output by the motive-power output portion into relative opening/closing motions of the pair of gripping pieces； and an insulating member that is provided in a pathway connecting the pair of gripping pieces and the motive-power output portion via the motive-power converting mechanism.
