This latent heat storage body is provided with: a latent heat storage material; and a temperature-sensitive material exhibiting different functions at a temperature equal to or higher than a specific temperature and at a temperature lower than the specific temperature, in which a phase change temperature is changed by using the function of the temperature-sensitive material according to ambient temperature. This latent heat storage body is characterized in that: the phase change temperature is set, by the function of the temperature-sensitive material when the ambient temperature is lower than the specific temperature, to one among a low temperature setting and a high temperature setting having a higher temperature than the low temperature setting; and the phase change temperature is set to the other setting among the low temperature setting and the high temperature setting by the function of the temperature-sensitive material when the ambient temperature is equal to or higher than the specific temperature.