During routine dissection for Ist MBBS students on 65 year old donated embalmed male cadaver in the Department of Anatomy, K.J.Somaiya Medical College, Sion, Mumbai, India, we observed an accessory head of the coracobrachialis muscle in the left arm. It extended downwards and medially from the middle part of the medial border of the humerusin front of the median nerve and brachial artery and finally was inserted on the anteromedial aspect of the medial epicondyle of the humerus. The length of the ligament was 15 cm and the diameter was 0.2 cm. The photographs were taken for proper documentation. The existence of accessory head of the coracobrachialis muscle should be kept in mind by surgeons operating on patients with high median nerve palsy and brachial artery compression and radiologists while doing scans of the arm.