A thermal insulating container (1) of the present invention includes a container body (9) formed of an inner container shell (2) for housing a heat generation unit (H), and of an outer container shell (3) for covering the inner container shell (2), and a vacuum layer (4) located between the inner container shell (2) and the outer container shell (3). Further, the thermal insulating container (1) is characterized in that the heat generation unit-side surface of the inner container shell (2) is covered with a thermal insulator (5). In the thermal insulating container (1), the thermal insulator (5) is provided between the inner container shell (2) and the heat generation unit (5), and the temperature rise of the inner container shell (2) is gas permeation through the inner container shell (2) is restricted.