Provided is a puncture device capable of suppressing excessive heating and insufficient heating of a living body by understanding to what degree the living body is being heated. A puncture device 1 according to one embodiment of 5 the present invention includes a puncture needle 10 that punctures a puncture site of the living body and supplies thermal energy, a sensor needle 11 having a puncture site temperature sensor 81 that measures the temperature of the puncture site, a holder 12 that holds the puncture needle 10 10 and the sensor needle 11, a cartridge 60 that receives the puncture needle 10, the sensor needle 11, and the holder 12, a main body 30 to which the cartridge 60 is attachable, a contacting unit 20 provided with through holes 28 penetrating the front and back surfaces thereof 15 and provided on the surface side thereof with a contacting surface 24b with the surface of the puncture site, and a drive unit 40 that moves the holder 12 such that the puncture needle 10 and the sensor needle 11 are projected and retracted from the contacting surface 24b via the 20 through holes 28.
