The present invention while suppressing the cost of the artificial knee joint replacement, is performed osteotomy work of the femur with high accuracy. A osteotomy guide positioning apparatus 10 includes an intramedullary rod 22 adapted to be inserted into the femur, is provided on one end of the intramedullary rod 22, close to the distal femur a base 24 that is configured to be placed in a fixed part 14 and a strut 26 which is detachably connected to the base 24, the femoral mechanical axis and the femur connecting the femoral head center and the knee joint center an indicator portion 50 which is configured as shown on the basis of the positional relationship between the femoral head center to form valgus angular and anatomical axes, a measuring section 16 having a first connecting portion 52 connected to the strut 26, bone It comprises a support body 82 which cut the guide is mounted detachably, and a guide support 18 and a second connecting portion 80 connected to the base 24. .BACKGROUND【課題】人工膝関節置換術の費用を抑えつつ、大腿骨の骨切り作業を高精度に行う。【解決手段】骨切りガイド位置決め装置10は、大腿骨の内部に挿入されるように構成された髄内ロッド22と、髄内ロッド22の一方端部に設けられ、大腿骨遠位端に近接して配置されるように構成された基部24と、基部24に着脱可能に接続される支柱26とを有する固定部14と、大腿骨頭中心と膝関節中心とを結ぶ大腿骨機能軸と大腿骨解剖軸とがなす外反角を大腿骨頭中心との位置関係に基づいて示すように構成された指標部50と、支柱26に接続される第1接続部52とを有する測定部16と、骨切りガイドが着脱可能に取付けられる支持部本体82と、基部24に接続される第2接続部80とを有するガイド支持部18とを備える。【選択図】図3
