Muscles of the arm exhibit numerous variations. Commonest muscle of the arm to show variations is the biceps brachii. During routine cadaveric dissection in the Department of Anatomy, GMC, Amritsar, India, we came across an abnormal biceps brachii muscle bilaterally in one cadaver. The long head of biceps brachii instead of arising from the supraglenoid tubercle, arose from the capsule of the shoulder joint. The short head had its normal origin. The insertion and nerve supply of the muscle showed no variation. This prompted us to review the literature in order to ascertain the incidence and clinical significance of this variation.