To provide a compact heat storage type hot water supply device requiring only a small installation space, capable of providing hot water supply performance equal to a conventional one.

A plurality of heat storage cans 1, 5 with interiors filled with heat storage material 2, and provided with heating means 3, 6 and hot water supply heat exchangers 4, 7, are provided side by side. Each heat storage can 1, 5 is individually communicated with a water supply pipe 10 and a hot water supply pipe 15. Opening and closing means 12, 13 subjected to opening and closing control on the basis of a supply hot water temperature or heat storage can 1, 5 temperatures are provided between the water supply pipe 10 and an inflow side of each hot water supply heat exchanger 4, 7. By this, by using the plurality of heat storage cans side by side, wasteful heat dissipation can be minimized, favorable hot water supply can be efficiently carried out. By using a heat storage material capable of absorbing and dissipating larger amounts of thermal energy than water, hot water supply of capacity the same as a conventional one can be carried out by a small amount of heat storage material, only a very small heat storage can will be needed, and a whole of a hot water supply apparatus can be compactified.