The invention relates to a water supply device for supplying an ice cube maker and/or a water dispenser of a refrigerator and/or freezer. Said device comprises a water tank having a filling opening for manually filling the water tank and a dispenser connection for connecting the water tank to a supply line of the ice cube maker and/or the water dispenser. The invention also relates to a refrigerator and/or freezer which is provided with said water supply device. The aim of the invention is to combine the advantages of a fixed mains water supply with those of a manually fillable water tank. The invention is characterized by using a manually fillable water tank which is provided with a fixed mains water supply for connection of the water tank to a stationary water-supply line. The water supply device can be operated either manually, especially when there is no fixed mains water supply, or automatically, when there is such a fixed mains water supply. The inventive water supply device allows the comfort of a fixed mains water supply while not requiring the presence of a stationary water supply line for the installation or operation of the refrigerator having a water supply point. The combination of the manually fillable water tank with the fixed mains water supply is advantageous over pure fixed mains water supply solutions even in the automatic mode. The system can be simply cleaned by adding a cleaning agent through the filling opening of the water tank. Other additives can simply be added to the water to be dispensed. When the refrigerator/freezer is switched to automatic mode, the first filling of the tank, especially the water that stayed in the supply line over a longer period, can be quickly and easily disposed of by draining the water from the tank.