Abstract: The invention relates to a suction box for a central vacuum system, comprising a cover part (1) designed to be mounted against the exterior surface of a wall, a counterpart (2) of the cover part, designed to be mounted inside the wall, and a 90.degree. suction bend (3) designed to bend the suction tube inside the wall to a direction parallel to the plane of the wall. According to the invention, the counterpart (2) and the auction bend (3) constitute a solid integral body (4) comprising a supporting surface (5) resting against the interior surface of the wall board, a round-shaped mounting flange (6) raised from the supporting surface and designed to be placed in a hole in the wall, and curved and elongated attachment areas (7) to which the cover part (1) can be fastened.