In literatures, osteochondral fragment could be founded in 68% of acute displaced ankle fractures that could not be founded on plain X-ray. And skin necrosis following open reducion and internal fixation of ankle fractures are reported to be 3% that could result in serious problem. Above 2 problems could be handled with arthroscopic assisted fixation. We did arthroscopically assisted internal fixation on 6 cases of acute displaced ankle fractures. The results were as follows ; 1. No patients suffered from soft tissue problem. 2. Osteochondral fragment were founded in 3 cases and was debrided 3. According to Evanski and Waugh, mean functional score was 42 points, pain score was 36 points and R.O.M score was 7 points respectively. The results were excellent in all cases. 4. In roentgenographic study, nearly anatomic reduction was noted in all medial malleus fractures. In conclusion, better evaluation and management of osteochondral fragment, shorter hospitalization and quicker recovery were advantages of the arthroscopically assisted treatment of ankle fractures.