Overheat prevention device for household bean milk and bean curd makers is disclosed. Such makers include a housing having a cavity to contain water therein, a main body, and a drive motor to rotate a cutting blade on an end of a drive shaft. A heater may be provided which generates heat when electricity is applied to the heater, thus heating an interior of the housing. Overheat prevention device includes a temperature sensing and fusing bar extending to a predetermined length to reach a position around the filter net and has a temperature sensor to detect an internal temperature of the housing, and a thermal fuse to cut off electricity supplied to the heater, when the interior of the housing overheats. Overheat prevention device allows the thermal fuse to accurately detect an internal temperature of the housing, therefore preventing the bean milk and bean curd maker from overheating.