PURPOSE: To wrap an air-permeable sheet on a cylindrical body smoothly while fastening a continuous belt to the whole periphery of the cylindrical body assuredly by a method wherein a continuous belt, which moves along the peripheral direction of a cylindrical body on which an airpermeable sheet is wrapped, is provided, and frame, which supports the continuous belt, is constituted to be able to approach/separate from the cylindrical body in 2 steps.

CONSTITUTION: A wrapping device 2 is equipped with a first frame 3, which is pivotally fitted to a first rotating shaft 4, and a second frame 6, which is pivotally fitted on the end of the first frame 3 through a second rotating shaft 5. The first and second frames 3, 6 rotate around the rotating shafts 4 and 5, and are respectively able to approach/separate from a bottle 9, and a continuous belt 10 is fitted on the first and second frames 3, 6. The bottle 9 is held by rotary sleeves 7, 8 by both ends. At a position where the tip of an air- permeable sheet 1 more or less has passed the top of the bottle 9, the first frame 3 rotates, and the second frame 6 rotates successively, and the belt 10 covers almost the whole periphery of the bottle 9, and when the belt 10 is driven in the direction shown by arrow D, the sheet 1 is wrapped on the bottle 9.