A sliding arm mechanism for attaching to an arm of a wheelchair is provided herein. One concept of the present disclosure is directed to a sliding arm mechanism that includes a main portion having a top area, a bottom area, first and second opposing end areas, first and second opposing side areas and an inner cavity. The sliding arm mechanism also includes a slide rail, comprising a top side, a bottom side and an elongated aperture located between the top side and the bottom side, which is adapted to be housed within the inner cavity of the main portion. The bottom side of the slide rail is removably coupled to a top part of the arm of the wheelchair. The slide rail and the main portion are slidably coupled to allow the main portion to move laterally over the slide rail in a direction parallel to the top part of the arm of the wheelchair, thus allowing the main portion to move between a first position and a second position. In some embodiments, the first position corresponds to a full-length position and the second position corresponds to a desk-length position, such that a user can adjust the sliding arm mechanism to be able to access a desk or table.
