To shift a fragment of a connection belt to the prescribed place without scattering the fragment in driving a nail.

In a nail driving machine for connection nails in which connection nails consisting of a large number of connected nails 5 through a plastic connection belt are used, and the connection nails are successively fed to a nose part 2 and hit and driven by a driver provided on a nail driven machine body, a cylindrical block 7 is fitted to the tip of the nose part 2, and an air blowing-in means is connected to one side part of the block 7. A hose 10 to transfer a fragment 13 of the plastic connection belt is connected to the other side part, and when the tip of the block 7 is abutted on a member 12 to be driven to drive the nail, the fragment 13 of the plastic connection belt which is broken and scattered in the block 7 is transferred to the prescribed place by the hose 10 through the air from the air blowing-in means.