Twenty-four cases of complete acromioclavicular dislocation had been treated surgically by Weaver and Dunn method at Hanil Hospital during the period from March 1976 to March 1988. Among twenty-four cases, we had average 84.4 months follow-up data on fifteen cases with acute complete dislocation and two cases with chronic complete dislocation. The following results were obtained. 1. The transferred coracoacromial ligament had been secured to the resected clavicular end by wire or silk(silk in eleven cases, wire in six). All patients in wire sutured group had to be reoperated on because of breakage of wire. But no significat differences in final clinical function of the shoulder was seen. 2. Calcification was found in the region of the transferred coracoacromial ligament in twelve cases(70.6%). 3. All patients had normal shoulder motion, sixateen(94.1%) were asymptomatic, and only four(23.5%) felt mild weakness of shoulder. 4. On the clinical assessment by the criteria of Imatani et. al., 12 patients(70.6%) were graded excellent, 4 patients(23.5%) were good, and one patient(5.9%) was fair.