Latent heat storage apparatus

A latent heat storage apparatus for obtaining sure latent heat from a latent heat storage material includes a plurality of small chambers for encasing at least the latent heat storage material. A capillary member is provided between the plurality of small chambers so that the contents of the plurality of chambers are coupled to each other. With this arrangement, the crystallization of the latent heat storage material in at least one small chamber is spread out into the other small chambers. In the case that the present invention is applied for a supercooling-prevention type heat storage apparatus, a supercooling-prevention material is encased in one of the small chambers. On the other hand, in the case that the present invention is applied for a supercooling type heat storage apparatus, one end portion of the capillary member is put out so that the latent heat storage material in the small chambers is crystallized by stimulation of the end portion thereof.