Authors described operation technique and early results after TKA of the 13 knees after failed high tibial osteotomy. There were 12 women and 1 man of age from 62 to 80 (average 68.3). Primary Coventry osteotomy was done in 11 knees and 2 in “strange” one. Pain, osteoarthrotic changes and malalignment of mechanical axis of the knee and in two cases tibia nonunion were an indication for surgery. All patients show good and very good early results after TKA according to Clinical Rating System of The Knee Society. Authors discussed the technical problems during TKA to achieve a good mechanical axis of the leg. The outcome of total knee arthroplasty (TKA) in patients after failed proximal tibial osteotomy depends from severity of deformity of the tibia and could by worse than after primary TKA.