A transport box configured for being transformable into a lap tray, which includes a compartment defined by opposite side walls, a front wall opposite a rear wall, and a bottom, with the walls delimiting an opening opposite the bottom for accessing the compartment, the opening having a circumferential edge which is defined by opposite upper edges of the side walls, an upper edge of the rear wall and an upper edge of the front wall, and a lid for the opening comprising at least a first lid part extending from the circumferential edge of the opening. The bottom has a front wall edge and a rear wall edge, which rear wall edge is shorter than the front wall edge, and the first lid part is configured for being folded or pivoted away from the opening in a transformed state of the transport box to serve as a lap tray.