PROBLEM TO BE SOLVED: To provide a bath agent for reducing an insensitive temperature in which the reduction effect of the insensitive temperature due to carbon dioxide is enhanced, and thereby, the durability of the effect is improved, and a simple and effective low-temperature bath can be realized.SOLUTION: Provided is a bath agent for reducing the insensitive temperature, that is a bath agent used for bath water which is at a temperature equal to or below deep body temperature, contains a carbon dioxide generating substance, and a nonionic surfactant which has an oleyl group or an oleoyl group, and is used for reducing the insensitive temperature at the time of bathing.
