The distal ulnar resection, Darrach operation, has been used for several conditions such as fracture about wrist joint, rheumatoid arthritis or ulno-carpal impingement syndrome. But, this operation could be led to have excessive unphysiologic increase radial loading on the radio-carpal joint and early osteoarthritis is thought to be inevitable in long-term follow-up. So, we performed various kind of reconstruction for 19 cases with dislocated distal radioulnar joint, and compared their radiologic and clinical results with that of the group for total 13 cases with distal ulnar resection. Through this study, we could find out that the preservation of normal relationship of dislocated distal radioulnar joint is considered as more desirable than that of removal of ulnar head.