Abstract: Background: Rheumatoid arthritis (RA) is a chronic inflammatory disease that affects the hand joints and leading to impairment in hand function and reduce grip strength. Rheumatoid arthritis mostly affects small joints resulting in structural damage of metacarpophalangeal joint (MCP) resulting in ulnar deviation. Orthosis are designed to maintain the hand function but mostly the resting hand orthoses which are available hinders the activities of daily living. Hence, a modified dynamic wrist hand orthosis was designed keeping in mind that it does not restrict any activity and is helpful in correcting the alignment of hand by restoring biomechanical balance and reducing tissue stress thereby improving grip strength and hand function of patients with rheumatoid arthritis.