The puncture tool 9 includes a needle tube 21 having a channel therein, an opening portion 34 c disposed at a proximal end portion of the needle tube turning operation portion 34, a cone disposed at the distal end portion of the needle tube 21 and having a conical shape for puncturing the subject An opening portion 21 c provided on the proximal end side of the conical portion 21 a and communicating with the channel, and an opening portion 21 c which can be inserted into the channel of the needle tube 21 and is inserted from the opening portion 21 c when the cutting portion is inserted through the channel A protrudable blade 22, and a connector 9 a 1 for electrically connecting the conical portion 21 a and the high-frequency power supply device 8.穿刺具9は、内部にチャンネルを有する針管21と、針管回動操作部34の基端部に配置された開口部34cと、針管21の先端部に配置され、被検体に穿刺するための円錐形状部21aと、円錐形状部21aの基端側に設けられ、チャンネルに連通する開口部21cと、針管21のチャンネルに挿通可能であり、チャンネルに挿通されたときに開口部21cから切削部を突出可能なブレード22と、円錐形状部21aと高周波電源装置8とを電気的に接続するためのコネクタ9a1と、を有する。
