PROBLEM TO BE SOLVED: To provide an incision device that allows for a surgical operation having low invasiveness.SOLUTION: An incision device 1 includes: a tubular sheath 2; an electrode part 3 provided in a distal end part of the sheath 2; a proximity sensor 4 provided in proximity to the electrode part 3 in the distal end part of the sheath 2 to detect contact of a detected body; and a notification part 6 for notifying that the proximity sensor 4 detects the detected body.SELECTED DRAWING: Figure 1ACOPYRIGHT: (C)2020,JPO&INPIT【課題】侵襲性の低い手術を可能とする切開装置を提供すること。【解決手段】切開装置1は、管状のシース2と、シース2の遠位端部に設けられる電極部3と、シース2の遠位端部に電極部3と近接して設けられ、被検出体の近接を検出する近接センサ4と、近接センサ4が被検出体の近接を検出したことを報知する報知部6とを有する。【選択図】図1A