Abstract: Objective: To provide anatomic basis for preservation of the intercostobrachial nerves (ICBN) during axillary node clearance for breast cancer. Methods: The ICBN and ambient tissues and structure were observed and measured by anatomizing 5 adult embalmed cadavers (10 sides). Result: a) The diameter of ICBN in adult embalmed cadavers was bigger than that of the patients during operation; b) The origination and destination of ICBN and the distance between ICBN and ambient tissues in adult embalmed cadavers were similar to those in the patients during operation; c) The form of ICBN in adult embalmed cadavers was simpler than in the patients during operation, which was single trunk with branches merely because of deficiency of adult embalmed cadavers and, d) The branches of ICBN in adult embalmed cadavers were more complicated than that of patients during operation due to anatomizing quite. Conclusion: Finding out the anatomic characteristic of the intercostobrachial nerves (ICBN) in adult's corpses can benifit to preserve them during axillary nodes clearance of breast cancer and can decrease the risk of PMPS.