To bind a leaf side of easily breakable green onion without any damages when binding long vegetables such as a plurality of bound green onion at two parts on a root side and a leaf side using an adhesive tape by a binding device comprising a conveying means for receiving objects to be bound of a predetermined amount on the feeding part side and conveying them to the binding position on the other side, a binding unit for binding the objects conveyed to the binding position by the conveying means with an adhesive tape, and an adhesive tape delivering unit for feeding the adhesive tape to the binding unit.

An adhesive tape slacking means 51 for providing slackness to an adhesive tape 8 by forcibly delivering the adhesive tape before binding an object C to be bound with the adhesive tape 8 is provided between an adhesive tape delivering unit 11 and a binding unit 9. The adhesive tape slacking means 51 is changeable to a working state and a non-working state.