The present invention relates to a system for transportation of goods in a loading space. The system comprises a conveyor (1) for goods which is drivable to and for in the loading space. To provide a quickly and easily fittable system for transportation of goods which is of low weight and easy to work with, the conveyor comprises a first element (3) with a goods-bearing belt and with a wall (6) disposed transversely to the driving directions of the conveyor, the goods-bearing belt being fastened to the wall via a first end portion, the wall being movable between a first extreme position (A) at or in the vicinity of an aperture to the loading space and a second extreme position at a far end of the loading space from said aperture, and a second element (4) disposed at or in the vicinity of the aperture to the loading space as a continuation of said first element of the conveyor, to which second element the goods-bearing belt is fastened via a second end portion and, during movement of said transverse wall between said extreme positions, is unwindable and windable about two elongate rollers (7, 8) supported for rotation in the vehicle at a distance from one another, so that the instantaneously uppermost strand of the goods-bearing belt wound about the rollers serves as a movable loading and unloading surface for goods between said rollers. The conveyor (1) is also configured to allow movement of the transverse wall (6) between said extreme positions and thus at the same time to unwind or wind the goods-bearing belt.