Wall desk

The utility model discloses a wall desk comprising a bottom plate, a desk plate, a main support plate, two auxiliary support plates and a sliding bar. A wall is provided with a concave area along the bottom, as large as the bottom plate. Two ends of a bottom edge of the bottom plate are hinged to two feet of the concave area; the bottom of the bottom plate is provided with a fastener mechanism; two sides of the bottom plate are provided with retaining plates; one end of the main support plate is hinged to the bottom of the desk plate; the other end of the main support plate is hinged to the surface of the bottom plate; one end of every auxiliary support plate is hinged to the bottom of the desk plate, and the other end of every auxiliary support plate is hinged to the sliding bar; the sliding bar is disposed on the surface of the bottom plate and perpendicular to a front-rear direction of the bottom plate; two ends of the sliding bar are abutted to the two retaining plates on the bottom plate; hinged rotational planes of the main support plate and the auxiliary support plates are all vertical planes parallel to the front-rear direction of the bottom plate; lines of the main support plate and the auxiliary support plates at the hinging positions on the desk plate form a regular triangle. The wall desk can be hidden in the wall.