A material rack includes a frame, at least one tray and at least one stopper. Each tray is movably received in the frame in a first direction. Each stopper is movably received in the frame in a second direction, and comprises at least one stopping portion. An edge of each tray is recessed toward the stopper to form at least one stopping groove. Each stopping portion is detachably received in one of the at least one stopping groove. The first direction is different from the second direction.