To easily set a sealing tool by forming a filament section with an insertion head formed on one end and a socket section formed on the other end into the bending shape or forming portion at least on a part thereof in a sealing tool for sealing by setting a tag such as a label, a price tag or the like on a commodity such as a pair of shoes and a bag.

A sealing tool 20 is provided with a filament section 5 with an insertion head 19 having a plate section 9 as an engaging section on one end and a socket section 8 with a hole 10 for inserting irreversibly the insertion head 19 on the other end, and sealing tool is set on an exclusive driving device in the state of arranging a plurality of sealing tool bodies adjoining one another. Each of the insertion heads 19 and each of the socket sections 8 in the temporarily setting state are connected with connecting bar sections 11 provided respectively and individually. The filament section 5 is bent on an intermediate section 5a on the sealing tool 20 to easily mount the sealing tool 20 on the exclusive driving device. The intermediate section 5a can be folded at a sharp angle.