A retractable work surface for a chair is provided for a chair that has a pair of arms. The work surface has a removable plate that can be coupled to one of the chair arms or the other. An L-shaped rod is coupled on one end to the plate so that is can rotate with respect to the plate. The other end of the rod has a bracket on one side and a tray on the other side. The bracket and tray can rotate as a unit with respect to the rod. The work surface is easily moved from one arm to the other by removing the plate from one arm and moving it to the other, and by reversing the rod and bracket. The work surface can also easily be retrofit to existing chairs by simply mounting the plate to one of the chair arms.