PROBLEM TO BE SOLVED: To quickly and safely lower a living body temperature to a prescribed low temperature.SOLUTION: A body temperature lowering method includes a step of making an alternating magnetic field or a pulsed magnetic field act on a living body, and a step of lowing the body temperature of the living body at a prescribed speed. A body temperature lowering device 100 includes a body-to-be-cooled support base 2 for mounting a body 1 to be cooled, a magnetic field generation part 4, a magnetic field generating power source part 5, a cooling fan 6, a refrigerant liquid temperature control part 7, a refrigerant liquid circulation part 8, a refrigerant liquid storage part 9, and a body temperature/refrigerant liquid temperature measurement part 10.COPYRIGHT: (C)2013,JPO&INPIT【課題】生体温度を所定の低温まで迅速にかつ安全に降下させる。【解決手段】生体に交流磁場又はパルス磁場を作用させるステップと、前記生体の体温を所定の速度で降下させるステップとを有する体温降下方法である。体温降下装置100は、被冷却体1を載置するための被冷却体支持台2と、磁場発生部4と、磁場発生電源部5と、冷却ファン6と、冷媒液温度制御部7と、冷媒液循環部8と、冷媒液貯留部9と、体温・冷媒液温度測定部10とを備えて構成されている。【選択図】図1