An upright vacuum cleaner includes a nozzle assembly, a lower body pivotally connected to the nozzle assembly and provided with an inclination unit on the outer circumferential surface of the lower body, an upper body rotatably connected to the lower body, a bearing member installed between the lower body and the upper body, a steering unit contacting the inclination unit and elastically installed on the upper body, wherein, when the upper body is swiveled with respect to the lower body, the steering unit is moved upwards and downwards by the inclination unit and then applies pressure to the upper body so as to return the upper body to its original position.