Heat storage member, manufacturing method of same, and storage container, refrigerator, packaging container, clothing, glass and pillow using said heat storage member

The purpose of the present invention is to provide a heat storage member that can be manufactured easily and at low cost, and a manufacturing method thereof. In a first step (S1), a heat storage material solution and a gelling material are charged from a charging port in the packaging. Next, in a second step (S2), the space in the packaging, filled with the heat storage material solution and gelling material, is degassed and defoamed, and the charging port is sealed. Next, in a third step (S3), external pressure is applied to the packaging and an operation for changing the shape of the packaging is repeated to mix and dissolve the gelling material into the heat storage solution inside of the packaging. Next, in a fourth step (S4), the heat storage member, which encloses the gelled heat storage material, is completed by UV radiation and/or heating from outside of the packaging.