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 guide bar coupled to the wheel cover and provided in an up and down direction, the guide bar being inserted through the driving module to guide the upward and downward movement of the driving module, and an elastic member surrounding the guide bar and connected to the wheel cover and the driving module, respectively, to absorb impacts while the driving module is moved up and down.