Aims: The purpose of this study is to review the results of our experience in the treatment of all of the cases of ßoating knee from 1990 to 2000 by means of a retrospective study. Methods: 21 patients, 17 males and four females, mean age 25 y. o. average follow up 48 months. Left knee involved in 13 cases. The mechanism of injury was a motor vehicle accident in 70%. 67% of the patients had concomitant-life-threatening injuries. 14 of 21 cases were Fraserñs type I and 7 were Fraserñs type II. Forty per cent of all the fractures were open. Time until surgery was 5 days. The most frequent surgical method was nailing. The follow up assessment included the Kalstršm and Olerud scoring system. Results: Excellent or good results were obtained in 9 of 21 patients (44%). Fair or poor results were obtained in 12 of 21 cases (56%). Two patients underwent above knee amputation (9%), two cases of wound infection, two cases of fat embolism and two delayed bone union. Conclusions: These are often high energy injuries and most frequently occur in the politrauma patient. Surgical stabilization of both fractures and early mobilization produce the best clinical outcomes. Better results are observed when both fractures are diaphiseal than when one or both are intrarticular.