To provide a heat insulating truck, efficiently warming inside a house, also here without deteriorating a quality of foods or the like, and without reducing a capacity inside the house.

In this heat insulating truck, a hot water circulating circuit 20 is formed, which guides a hot water pipe to inside a house to supply hot water to a heat exchanger returned again to an engine room by arranging the hot water pipe taking out hot water from the engine room, also a heater 30 formed in a thin flat plate shape by applying a resistance material to a base panel in a side wall surface inside the house is arranged in a position where radiation heat is applied to an object. Further, in this constitution, in the heater 30, a receptacle part 60 is arranged, which attains connection to an AC power source for use of business or home.