Objective To evaluate the cl inical results of arthroscopical subtalar arthrodesis for malunion of calcaneal fractures. Methods Between July 2006 and December 2008, 12 cases of malunion of calcaneal fractures were treated witharthroscopical subtalar arthrodesis, inculding 10 males and 2 females with an age range of 38-54 years (44.8 years on average). The location was left side in 5 cases and right side in 7 cases. The injury was caused by fall ing from height in 8 cases, by traffic accident in 3 cases, and other in 1 case. It was 3-7 months from injury to operation. All cases were classified as Stephens type II. The total score was 35.68 ± 10.35 and the pain score was 8.14 ± 1.83 before operation according to Hindfoot scores system of American Orthopaedic Foot amp; Ankle Society (AOFAS). Results All incisions achieved parimary heal ing and the patients were all followed up 14-32 months (18 months on average). The X-ray films showed bony fusion after 10-14 weeks (11.5 weeks on average). The total score was 76.45 ± 9.83 and the pain score was 1.52 ± 1.48 after operation according to Hindfoot scores system of AOFAS, showing significant difference when compared with those before operation (P lt; 0.01). Conclusion Arthroscopical subtalar arthrodesis can get satisfactory fusion rate with few compl ications for malunion of calcaneal fractures.