A physiology enhancing device for improving physiological functions of a human body, etc., which comprises a heat generating element making use of chemical energy and a sheet interposed between the heat generating element and a body surface of a wearer, and which is designed to supply steam generated from the heat generating element while the device is applied to the body surface. The device exhibits steam generating capability for 2 hours or longer and, while applied to the body surface, raises the body surface temperature to a temperature from 38° C. to lower than 42° C. within one hour from the application. The sheet interposed between the heat generating element and the body surface preferably has a function of regulating air feed to the heat generating element and a function of transferring the heat of the physiology enhancing device to the body surface and preferably has a total thickness of 0.05 to 1.5 mm.