Median nerve. can be trapped anywhere especially in the carpal canal during the course of the upper limbs. Although sign and symptoms of the trapment can be changed according to entrapment level, generally symptoms are seen in thumb, second, third and lateral half of the fourth finger as pain, paresthesia, tingling, numbness and hand weakness. We can use physical examination tests such as Phalen test, Durcan test, Tinel test, Semmes-Weinstein sensibility test and hand diagram test. Furthermore we can also use imagining tools and electrodiagnostic studies to make diagnosis. The night splint, steroid injection and NSAID can be used as conservative treatment. The mini open surgery, open surgery and endoscopic surgery can be performed successfully as surgical treatment modalities. The studies showing precisely the superiority of these surgical techniques to each others are very low. The endoscopic surgery technique has long learning curve and thus more experience is needed.