VEHICLE BODY STRUCTURE OF WORKING VEHICLE

PROBLEM TO BE SOLVED: To easily attach-detach a fuel tank and a battery to a storage space formed on the reverse surface side of a boarding step, and to easily execute maintenance to the fuel tank and the battery.SOLUTION: A cover member 27 attachable-detachable to a lateral outer end part of the boarding step 8 is provided with a vertical directional cover surface 27A for covering a reverse surface side storage space 18 of the boarding step 8 from the lateral outside, an upper end extension part 27B extending to the boarding step 8 from the upper end of the cover surface 27A, a front end extension part 27C extending to the boarding step 8 from the front end of the cover surface 27A and a rear end extension part 27D extending to the boarding step 8 from the rear end of the cover surface 27A. An outer edge part 27E is formed of the upper end extension part 27B, the front end extension part 27C and the rear end extension paret 27D, by connecting the front end of the upper end extension part 27B and the upper end of the front end extension part 27C, and also connecting the rear end of the upper end extension part 27B and the upper end of the rear end extension part 27D, and is provided in the cover member 27.