A scanner with a foldable stand includes a housing, a first output tray foldably covered to an upper portion of a rear of the housing, a second output tray foldably covered to a top of the housing, a supporting stand and an abutting element. Two ends of the first output tray have a starting end, and a swingable connecting end connected to the starting end. An outer surface of the first output tray is recessed inward to form a holding groove. Two ends of the second output tray have a pivot end pivotally connected to the connecting end, and a swingable terminal end connected with a free end of the pivot end. The supporting stand is foldably fastened in the holding groove. The abutting element is formed at a middle of the connecting end. The abutting element contacts with an inner portion of the supporting stand.