A pet water dispenser may include a water tank having an upper opening, a pump, a water supply pipe connected to the pump to transfer water, and a water supply hole formed in a water supply plate communicating with the water supply pipe. A removable inner assembly may include the pump, the water supply pipe, and the water supply plate, and may further include a wireless power receiver to receive power from a wireless power transmitter, which may include a plurality of partially overlapping coils.