To easily and quickly perform a loading and exchanging of a fastener.

A fastener feed mechanism of a fastener driving tool is provided with a fastener supply path 18 which is opened to a nose part 14 at the front end, and opened at the rear end in a magazine 3. In the fastener feed mechanism, a connecting fastener is loaded from the rear end of the fastener supply path, and the rear end of the connecting fastener is pushed out forward by a pusher 20 to sequentially supply a forehead fastener to the nose part 14. The pusher 20 is turnably provided so that a feed pawl 22 formed on the front part appears and disappear to the fastener supply path, a stopper member 33 of which one end enters the fastener supply path to block the retreat of the connecting fastener is provided at the rear end part of the magazine 3, and an operation part 40 retreating one end from the fastener supply path is formed at the stopper member 33.