Ulnar nerve compression at the elbow can occur at any site that begins proximally at the arcade of Struthers and end distally where the nerve exits the flexor carpi ulnaris muscle in the forearm. We experienced one case of ulnar nerve palsy due to multiple ganglion cysts which had occured at the elbow joint. A complete excision of ganglion cysts and anterior transposition of the ulnar nerve were performed. The clinical result was satisfactory