To provide a method of removing latent-heat thermal storage body coagulation of a heat transporting system, and a radiation unit for removing the latent-heat thermal storage body coagulation which may cause a trouble in blocking.

This method of removing the latent-heat thermal storage body (erythritol) coagulation, has a heating process for heating oil 2 to a temperature of a melting point of erythritol or higher by receiving only the oil 2 in a heat storage container 1b, and using a heat storage unit, and a circulating process for melting erythritol in the radiation unit 7 while circulating the oil 2 after heating, in the heat storage container 1b and the radiation unit 7.