PROBLEM TO BE SOLVED: To provide an auxiliary tool for agricultural work or the like which is used as an auxuiliary tool, when constructing or backing off an agricultural greenhouse, and also used even when harvesting and conveying farm crops, for example. SOLUTION: The cart with a greenhouse-film rolling-up mechanism is structured by mounting right and left almost U-shape pipes 3 and 4 at intervals each wider than the horizontal width of an arched greenhouse support S to attach wheels 6 to the lower end parts of supporting legs 3a, 3b, 4a, and 4b hanging downward from the pipes 3 and 4 respectively; setting up a baggage-mounting part 7 at the upper part of each of the pipes 3 and 4; constructing a four-wheel type cart body 2 which can run while striding the greenhouse support S driven into the ground by making the height from the wheel 6 to the upper parts of the pipes 3 and 4 higher than the height of the greenhouse support S driven into the ground; and making a film rolling-up mechanism 18 winding off or reeling off a greenhouse film F, freely attachable to the cart body 2. COPYRIGHT: (C)2011,JPO&INPIT