PURPOSE: To provide a hot water feeding device wherein the utilization efficiency of a solar heat hot water device in combination with an electric hot water device can be improved.

CONSTITUTION: Feed lines 3, 7, 10 are connected to a mixer 13. The mixer 13 has a high temperature side feed water port and a low temperature side feed water port and the feed ratio of water is controlled based on a set temperature so that the temperature of a mixture of water comes to a set temperature based on the temperature of the water flowing into both ports. A temperature detecting sensor 11 detects the temperature of hot water of a solar heat hot water device 2 and a comparing circuit 12 compares the set temperature with that of hot water of the device 2. A line changeover device 16 is interposed between the mixer 13 and the feed lines and the device 16 changes over the lines based on the circuit 12 in such a manner that if the temperature of hot water of the device 2 is higher than the set temperature, said hot water is supplied to the high temperature side feed water port and cold water is fed to the low temperature side feed water port. If the temperature of said hot water is lower than the set temperature, the hot water of the device 2 is fed to the low temperature side port and hot water of an electric hot water device 1 is fed to the high temperature side port.