A vehicle body includes a rigid member having a tubular shape that is closed in cross-section. The rigid member includes a front member, a dash cross member, a rear member, and a center member, which form main frames at the front, rear, and center of the bottom of the vehicle body. The rigid member also includes pillar members that form main frames at both sides of the top of the vehicle body. Connecting members that each have a tubular shape that is open at one surface thereof are connected to the members of the rigid member.