The present invention relates to a lid device for covering a loading cargo of a freight vehicle, and the nature of such freight car is limited to the operation of the downtown area. That is, a lot of loads are loaded on a loading cargo of a freight vehicle and pass through a downtown area, which causes road damage due to overload and load of the load. In addition, there may be a risk of major accidents, as loading defects may cause the load to fall on the road and interfere with the operation of other vehicles or cause direct damage to the following vehicles. The present invention relates to a lid device for a freight vehicle that minimizes this risk and conveniently covers the ladder completely.
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