A vehicle body structure includes a reinforcing unit disposed between outer and inner walls. The reinforcing unit includes an intermediate plate disposed between the outer and inner walls, and a plurality of reinforcing members, each of which has a first U-shaped strip portion mounted fixedly between the inner wall and the intermediate plate, and a second U-shaped strip portion mounted fixedly between the outer wall and the intermediate plate. Each first U-shaped strip portion has two ends connected fixedly to the intermediate plate, and a bent portion connected fixedly to the inner wall. Each second U-shaped strip portion has two ends connected fixedly to the intermediate plate, and a bent portion connected fixedly to the outer wall.
