VEHICLE BODY STRUCTURE

In a vehicle rear structure that is one example of a vehicle body structure, a rear suspension tower (16) that is made of aluminum die-cast and a wheel house outer (20) that is made of metal material having higher fatigue strength than the rear suspension tower (16), are joined together via an extension panel (22) that is made of metal material having higher fatigue strength than the rear suspension tower (16). Further, a step portion (36) is formed between an inner peripheral portion (30) and an outer peripheral portion (32) of the extension panel (22).