Provided is a puncture device with which it is possible to understand to what degree a living body is being heated, and which is capable of suppressing excessive heating and insufficient heating. A puncture device 1 according to a mode of embodiment of the present invention is provided with: a puncture needle 10 which punctures a part of a living body to be punctured, and which supplies thermal energy； a sensor needle 11 including a punctured part temperature sensor 81 which measures the temperature of the punctured part； a holder 12 which holds the puncture needle 10 and the sensor needle 11； a cartridge 60 which accommodates the puncture needle 10, the sensor needle 11 and the holder 12； a main body 30 to which the cartridge 60 can be attached； a contacting portion 20 in which through-holes 28 penetrating through from the obverse side to the reverse side are formed, and which has on an obverse surface side a contacting surface 24b which comes into contact with an obverse surface of the punctured part； and a drive unit 40 which causes the holder 12 to move in such a way that the puncture needle 10 and the sensor needle 11 are extended and retracted from the contacting surface 24b through the through-holes 28.
