PURPOSE: This study evaluates the effectiveness of the condylar blade plate for internal fixation of unstable trochanteric fractures of the femur. MATERIALS AND METHODS: Twenty six unstable trochanteric fractures of the femur (AO classification, 9 type A2 and 17 type A3) were treated by condylar blade plate fixation. Osteoporosis was found in 14 cases. Fractures were operated on the average 7th day after trauma and cancellous bone graft was performed in 3 fractures with severe comminution. Results were evaluated by operating time, time of fracture healing, complications, and function of the hip and walking ability at the final follow-up assessment. RESULTS: Operating time was 123 minutes on average. All fractures were united in an average of 14.0 weeks. Complications at the fracture site were a heterotopic ossification and a refracture. Motion of the hip was limited moderately in a case with heterotopic ossification and mildly in 5 cases. Two patients used a cane and 2 patients revealed a mild limp. CONCLUSION: Although the condylar blade plate is technically difficult to apply, it provides stable fixation to obtain good results with less complications for unstable trochanteric fractures of the femur, especially even in the presence of osteoporosis.