The present disclosure relates to a cleaner including a cleaner main body having a controller, a wheel cover mounted on the cleaner main body, a driving module coupled to the wheel cover to be movable up and down, a driving wheel coupled to the driving module and configured to be rotatable by receiving driving force from the driving module, a suspension configured to guide the upward and downward movement of the driving module and absorb impacts while the driving module is moved up and down, a link member rotatably installed on the wheel cover, and rotated by being in contact with a protrusion of the driving module when the driving module is moved downward by a preset distance, and a switch pressed in response to the rotation of the link member to transfer a signal to the controller.