To make it possible to change the pulling force of a binding tool which binds a bundle of an object to be bound with a metallic strap or a metallic cable tie wound around the bundle.

This binding tool is provided with a tool body, a front handle and an adjustable back handle. The front handle is provided at the inside of the tool body, and the back handle is connected with the tool body movably. The front handle is provided with a pulling force giving mechanism and the mechanism is provided with a rachet mechanism for giving pulling force set in advance in the binding tool wound around the bundle of an object to be bound. The front handle is provided further with a lock-out mechanism, and the lock-out mechanism makes it possible to give the tool desired pulling force by disabling the set value of the pulling force set in advance relative to the pulling force giving mechanism.