To provide a desk in which the usability of OA equipment is effectively improved.

A wiring space extended along the width of the unused end sides of top plates 3 and open to the sides of the top plate surfaces is formed, and electrical outlet units 4 and covers 5 are provided at locations that can close the wiring space. The outlet unit 4 is detachably arranged at a location that can close the approximate center of the width of the wiring space corresponding to the width W of the top plate for the use of one person, and a wiring insertion openings 6 is formed each between both side edges 41d of the outlet unit 4 and the opposing edge of each cover 5.