To provide an accessory which is reliably fitted by not less than a fixed level of magnetic attraction force with the use of a metallic magnet, raises safety against theft, is excellently fitted to a user, and is excellently fitted by the user him/herself.

The accessory includes an accessory body (a magnet incorporating string shape body 11) where the plurality of columnar metallic magnets 13, 14, 15 are inserted to a string shape tube 12, which is constituted of a flexible material and is twisted and bent, and the north pole and the south pole are alternately arranged on the outer peripheral surface of each column; and fasteners capable of fixing both the ends of the accessory body (the magnet incorporating string shape body 11) in a state where one end and the other end of the accessory body are set in parallel.