Ulnar impaction syndrome usually happened in ulnar positive wrists, but it may occured in ulnar neutral or negative wrists. Wafer procedure is a technique of partial resection of distal ulna with less disability than usual ulna shortening procedure. There are 3 ulnar negative patients who failed in conservative treatment with the diagnosis of ulnar impaction. They received Wafer procedure with a minimum of 18 months follow up. The clinical results are excellent.