Aim to study the unusual trifurcation of brachial artery. 100 upper limbs of 50 donated embalmed cadavers (45 males & 5 females) of age group ranging from 70 to 80 years were dissected in the department of Anatomy at K. J. Somaiya Medical College, Sion, Mumbai, INDIA. The unusual trifurcation of brachial artery was observed in 2 specimens. The neuro-mascular pattern in the arm was also observed. The photographs of the unusual trifurcation of brachial artery were taken for proper documentation. The unusual trifurcation of brachial artery was observed in 2 specimens. The brachial artery trifurcated into radial, ulnar and common interosseous arteries. The knowledge of unusual trifurcation of brachial artery is clinically important for clinicians, surgeons, orthopaedicians and radiologists performing angiographic studies.