To provide an electric water heater of a hot water storage type for increasing the amount of hot water usable without increasing the output of an electric heater or the capacity of a hot water storage tank.

In addition to a first electric heater control means 31a for controlling the electric heater 13 depending on a detection result of a hot water detecting means 14 when an electric valve 4 is in a closed condition, a second electric heater control means 31b is provided for controlling the electric heater 13 depending on a detection result of the hot water detecting means 14 when the electric valve 4 is in an opened condition. Thus, the energization of the electric heater 13 is started quickly after the use of the hot water is started.