Abstract: An apparatus for drawing-up and winding-up booms, including self-expanding booms, which are provided with an upper floating body portion and a lower skirt portion, includes a plate arranged on a platform. The plate is rotatable by use of a motor unit, and is provided with a winder positioned generally vertically and at the middle of the plate, and a feeder for feeding-in the boom. Preferably the motor unit can be plugged into and out of the platform, and the plate can be driven by means of a gear pinion which is arranged in the motor unit and goes into engagement with the plate when the motor unit is plugged into the platform. The apparatus includes a support that can be brought into contact with the boom at a border area between upper and lower portions of the boom and can be arranged between the feeder and the platform. The support can be plugged into and out of the platform.