To provide a desk and a workstation that assure an area required for a worker's personal work and that also assure a required area taking into account the psychology of the worker.

The desk or the workstation is equipped with a main top plate 1 and an auxiliary top plate 2. The main top plate 1 is positioned at least in front of or diagonally in front of a seated person W within a maximum work area S that nearly covers the normal work area R where the seated person W can reach his/her hand Wa in a normal working posture and where the seated person W can reach when he/she extends his/her hand Wa. The auxiliary top plate 2 is positioned at an unused edge of the main top plate 1 in an area that can reach the outer periphery of a territory T where the seated person W can feel not invaded by another person at least in front of him/her.