A body frame for a motorcycle for ensuring the binding rigidity between an engine and a body frame while reducing the weight of the body frame, and also increasing the flexibility of the disposition of motorcycle components. A body frame includes a first frame member and a second frame member, the first frame member and the second frame member being separated relative to each other. At least one engine support is formed integrally with the first frame member. Another engine support and a pivot portion for a rear swing arm is integrally formed with the second frame member. The first frame member gradually expands towards the at least one engine support with three approximately M-shaped projections being formed at an end of the first frame member wherein the at least one engine support is formed at these projections.