To provide a hot water storage type hot water supply device capable of improving coefficient of performance (COP) by positively consuming the water of intermediate temperature, while reducing costs and simplifying control by applying a simple constitution reduced in the number of mixing valves.

A high-temperature hot water supply passage 38 and a low-temperature hot water supply passage 40 are respectively connected to upper end portions of a high temperature tank 4a and a low temperature tank 4b as a hot water storage tank 4, an orifice 42 is disposed on the way of the low-temperature hot water supply passage, and the high-temperature hot water supply passage and the low-temperature hot water supply passage are directly joined to connect a combined hot water supply passage 44.