According to an aspect of the present invention, there is provided a driving device including: a driver bit for striking a fastener loaded in a launching section; a driver for driving the fastener from the launching section by reciprocating the driver bit; a triggering device pullable to control the driver; and a locking device that locks the pulling operation of the triggering device when being set to a lock position and that releases the locking state when being set to a release position, wherein the locking device includes a release device to operate the locking device toward the release position when the triggering device is pulled and a returning device to return the locking device toward the lock position when the pulling is released.