To provide a PC desk which allows an easy use of the key board and mouse and is compact in depth, length, and the right to left width and occupies a small floor area.

This desk comprises the main body, a key board table installed in an upper part of the main body, and a top plate for mounting the main body or a display disposed above the table. The right to left width of the table is larger than the width of the main body and is so connected to the main body by its lower face as to be moved horizontally through a guide mechanism.