To provide a dental treatment unit constituted so as to enable an operator and a patient to observe a display by arranging the display in the vicinity of the operator and the patient while enabling the operator to implement the function of the display in a state seated on a treatment chair.

The dental treatment unit has the display 9, a mouse 10 for functioning the display and a worktable having a planar region S of operating the mouse 10. The worktable is composed of a lower stage worktable 2L and the upper stage worktable 2U arranged on the lower stage worktable 2L in a movable manner. When the upper stage worktable 2U is moved, the mouse 10 can be operated on the planar region S of the lower stage worktable 2L.