Latent heat storage body

This latent heat storage body (1) is provided with: a latent heat storage material; and a temperature-sensitive material of which the function at a specific temperature or higher and the function below the specific temperature are different, wherein a phase-change temperature is changed by using the function of the temperature-sensitive material according to ambient temperature. This latent heat storage body (1) is characterized in that: the phase-change temperature is set, by the function of the temperature-sensitive material when the ambient temperature is less 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 greater than the specific temperature.