Background: The brachial plexus has a complex anatomical structure since its origin in the neck throughout its course in the axillary region1.The knowledge of distance of origin of the different branches from brachial plexus is helpful to redical neck dissections and other surgical operation of axilla and upper arm3. Thus, the comprehension of variation in the formation and distance of origin of branches from brachial plexus is key to anatomists, radiologists, surgeons, and the anaesthesiologists5. Objective: To measure the distance of origin of branches from posterior cord of brachial plexus from mid-clavicular point. Material and Methods: The study was conducted on 50 brachial plexus (25 on right and 25 on left) in 25 embalmed human cadavers of unknown age from the department of anatomy of Mahatma Gandhi medical college, Jaipur. The Brachial Plexus was dissected in embalmed cadavers and exposed according to Cunnigham’s Manual of Practical Anatomy by the help of dissecting instruments (scalpel, scalpel blade, blunt scissors, pointed scissors, blunt forceps, pointed forceps and Vernier caliper). Results: we have found the lower trunk is formed by the continuation of T1 spinal nerve in one cadaver; 3 out of 50 (6%) were found pre-fixed type of Brachial Plexus; Dorsal scapular nerve was originated from C4 spinal nerve bilaterally in one cadaver and unilaterally from left side in one cadaver and Communication of median and musculocutaneous nerve was found in 12% cases in right side & 8% cases in left side. Conclusion: In the present study an attempt has made to know the significance in distance of origin of branches from posterior cord of brachial plexus. Though these measurements mentioned in the present study may not alter the normal functioning of the limbs of individuals but the knowledge should be kept in mind by anatomists, radiologists, surgeons, neurologist, orthopedician and anaesthesiologist during surgeries or treatments.