Although several publications have reported delayed or non-union, there is a consensus that the standard treatment for atypical femoral fracture (AFF) is an intramedullary nailing. However, no case of tensile insufficiency fracture of femoral neck associated with intramedullary nailing in patients with AFF have been reported. Here, we report an 82-year-old woman with tensile type of insufficiency fracture of the femoral neck after intramedullary nailing for the treatment of AFF.