Abstract: Disclosed herein is a water/powdered milk mixing device, capable of mixing water and powdered milk, which are independently stored, at a predetermined concentration when a mixing switch is manipulated. The device has a water heating means (11) for heating water stored in a water storage container. The water heating means and a temperature sensor are controlled by a control unit (50). A predetermined amount of water is dispensed from the water storage container using a water supply pump, and the driving speed of a powdered-milk dispensing means (21) is controlled so that an amount of powdered milk corresponding to the concentration set using a concentration-control-switch is continuously dispensed to a powdered-milk outlet (22). Further, a mixing switch (40) is provided to control the ON/OFF operation of a water supply pump and the powdered-milk dispensing means, thus allowing a user to set the dispensed amount of mixed milk as desired.