A puncture tool includes: a needle tube internally including a channel an opening portion arranged at a proximal end portion of a needle tube turning operation portion a conical shape portion to be punctured into a subject, the conical shape portion being arranged at a distal end portion of the needle tube an opening portion arranged on a proximal end side of the conical shape portion and communicating with the channel a blade capable of being inserted through the channel of the needle tube and capable of causing a cutting portion to project from the opening portion when being inserted through the channel and a connector for electrically connecting the conical shape portion and a high frequency power supply device.
