From Nov. 1986 to May 1988, we experienced 5 patients of bilateral recurrent patellar dislocation and obtained the following results:1. The age at operation raaged from 17 to 25 years. Among 5 patients, four were female and one, male. 2. The age at the onset of symptom ranged from 7 to 16 years. 3. The common presenting symptoms were pain(5 knees), giving way(4), grating(4), swelling (3), and weakness(2). 4. The roentgenographic findings were lateral patella tilt(9 knees), lateral femoral condyle hypoplasia(6), patella alta(2), patella dysplasia(2), and accessory ossification center(2). 5. All knees were treated by Hughston technique:One patient(2 knees) was treated with proximal realignment only, and the others(7 knees) were with proximal and distal realignments. 6. Follow up period ranged from 1 to 2 years. And the excellent to good result was obtained from the patients treated with proximal and distal realignments(excellent in 4 knees, good in 2 knees), the fair result from the patient treated with proximal realignment only(2 knees), and the poor result from the patient slipped down at 6 weeks postoperatively(1 knee).