To improve working efficiency by facilitating cleaning operation by a vacuum cleaner.

A suction head 13 is connected to the end of a suction pipe 12 of an attachment around the axis X perpendicular to a floor surface so as to freely turn on a plane parallel to the floor. Even if the suction head 13 hits to an obstacle T by the forward travel of the suction pipe 12, the suction head 13 escapes, turning on the plane parallel to the floor surface, to prevent a shock. The suction pipe 13 and the obstacle T are free from damage, so that they do not require care for cleaning. A connecting part between the suction pipe 12 and the suction head 13 can be simplified.