A medial buttress construct for femoral neck includes a support part and an attachment fixing part fixedly connected to each other. The support part includes a structure matching an inferior surface of a proximal end of the femoral neck. The attachment fixing part includes structures simultaneously matching a front side surface of a distal end of the femoral neck and a front side surface of an upper end of femoral shaft. The attachment fixing part includes at least one opening for allowing a screw to pass through the structure matching the front side surface of the distal end of the femoral neck, and at least one opening for allowing a screw to pass through the structure matching the front side surface of the upper end of the femoral shaft. A fracture fixation device for femoral neck may include the medial buttress construct for femoral neck.