A rib (206c) is formed on a ceiling surface of a tape guide mounted on a driver handle of a binding machine for gardening, and two plate springs (224a, 224b) are mounted on the bottom plate portion of the tape guide. The plate spring (224a), which is situated on the downstream side, is elastically contacted with the rib (206c) to thereby allow the plate spring (224a) and rib (206c) to hold tape (T) between them, while the upstream-side plate spring (224b) is contacted with the tape. When a tape roll is rotated reversely and the tape is thereby pulled back, tension is applied to the tape existing between the rib (206c) and tape roll, and the upstream-side plate spring (224b) is raised up due to the friction of the tape to curve a passage of the tape, which increases the frictional resistance of the tape to thereby be able to prevent the tape (T) against reverse movement.