An electric cleaner provided with a main body comprised of a cleaner housing equipped with wheels for mobility on a floor surface. Both side surfaces of the main body extend outwardly beyond rim portions of the respective wheels that stay in contact with the floor surface, and a center of gravity G of the main body is placed in such a position that the main body rolls toward a direction where the wheels stand on the floor surface so as to retu rn itself into an original posture when the main body tilts in a way that one o f the side surfaces lies in contact to the floor.
