Provided is an ablation device whereby convenience can be improved. An ablation device 1 is percutaneously inserted in an affected area 90 in the body and comprises: an electrode needle 11 from which electric power Pout for performing ablation is supplied； a flow path 110 through which a liquid L for cooling flows, said flow path being formed in the interior of the electrode needle 11； a first temperature measurement element (temperature measurement element 115a) disposed within the flow path 110； a second temperature measurement element (temperature measurement element 115b) in the interior of the electrode needle 11 and disposed near the tip thereof； and a handle 13 attached to the base-end side of the electrode needle 11.本發明提供一種能夠提高便利性的消融裝置。消融裝置(1)具備：電極針(11)，對體內患部(90)經皮穿刺，並且被供給用於進行消融的功率(Pout)；流路(110)，形成在電極針(11)的內部，有冷卻用的液體(L)流動；第一溫度測量元件(溫度測量元件115a)，配置在流路(110)內；第二溫度測量元件(溫度測量元件115b)，在電極針(11)的內部，並且配置在電極針(11)的前端附近；以及手柄(13)，安裝在電極針(11)的基端側。
