A cleaner comprising: a power input unit for receiving and outputting power; a controller for selectively receiving power from the power input unit; a power consumption unit controlled by the controller; a manipulation unit for inputting a command for adjusting an operation state of the power consumption unit; and a power supply adjuster connected to the power input unit, the controller and the manipulation unit, wherein the power supply adjuster: supplies power received from the power input unit to the controller and transmits a signal for the intensity of the suction force to the controller, in a state in which an intensity of suction force is selected by the manipulation unit; interrupts supply of power received from the power input unit to the controller in a state in which an OFF command is input by the manipulation unit; is characterized by: a power switch connected to the power input unit and the manipulation unit; a first resistor connected to a first terminal and a control terminal of the power switch; and a second resistor connected to the control terminal of the power switch and one end of the manipulation unit. a power input unit for receiving and outputting power; a controller for selectively receiving power from the power input unit; a power consumption unit controlled by the controller; a manipulation unit for inputting a command for adjusting an operation state of the power consumption unit; and a power supply adjuster connected to the power input unit, the controller and the manipulation unit, wherein the power supply adjuster: supplies power received from the power input unit to the controller and transmits a signal for the intensity of the suction force to the controller, in a state in which an intensity of suction force is selected by the manipulation unit; interrupts supply of power received from the power input unit to the controller in a state in which an OFF command is input by the manipulation unit; is characterized by: a power switch connected to the power input unit and the manipulation unit; a first resistor connected to a first terminal and a control terminal of the power switch; and a second resistor connected to the control terminal of the power switch and one end of the manipulation unit. supplies power received from the power input unit to the controller and transmits a signal for the intensity of the suction force to the controller, in a state in which an intensity of suction force is selected by the manipulation unit; interrupts supply of power received from the power input unit to the controller in a state in which an OFF command is input by the manipulation unit; is characterized by: a power switch connected to the power input unit and the manipulation unit; a first resistor connected to a first terminal and a control terminal of the power switch; and a second resistor connected to the control terminal of the power switch and one end of the manipulation unit. a power switch connected to the power input unit and the manipulation unit; a first resistor connected to a first terminal and a control terminal of the power switch; and a second resistor connected to the control terminal of the power switch and one end of the manipulation unit.