Provided is a vacuum cleaner. The vacuum cleaner includes a cleaner body including a suction motor for generating a suction force, a suction part communicating with the cleaner body to suction air and dusts, at least one battery disposed in the cleaner body or suction part to supply a power to the suction motor, and a controller controlling an operation of the suction motor. The controller control an output of the suction motor according to a voltage of the at least one battery.