Electric circuit for preventing the burning of an electric motor energized by an electric source through the electric circuit. The electric circuit has a memory circuit actuated by a setting input pulse and reset by a resetting input pulse, a timing circuit connected to said memory circuit so as to be actuated thereby when the same is actuated while the timing circuit is rendered to be inoperative when the memory circuit is reset or a resetting input pulse is applied to the timing circuit, a relay connected to the timing circuit so as to be energized when the same is actuated, and a switch operatively coupled with the relay so as to energize the motor when the relay is energized while the motor is deenergized by the switch when the relay is deenergized, thereby permitting the motor to continue to be driven upon application of the setting input pulse to the memory circuit until the resetting input pulse is applied thereto. The timing circuit comprises a monostable multivibrator having a predetermined holding time which is selected to be suitable for preventing the burning of the motor under the overloaded condition. Thus, the motor is automatically deenergized after the energization thereof by virtue of the holding time before the resetting input pulse is applied to the memory circuit under the overloaded condition of the motor, while the reenergization of the motor by applying a further setting input pulse to the memory circuit is prevented until a resetting input pulse is applied to the memory circuit prior to the application of the further setting input pulse thereto.