To continuously drive fasteners such as nails or screws at equal pitches, while moving a fastener driving machine from a downside to an upside or in any direction such as lateral directions.

A driving machine 1 is driven and guided toward an opposite material, and configured to drive a fastener (14) disposed in an ejection port 5 to the opposite material 12 by being ejected from an ejection port 6 via a driving mechanism. The driving machine is provided with optical means 11a, 11b for irradiating an emission line of a line segment in which a length to an end becomes the same length as a driving pitch when a vicinity of the ejection port 6 is assumed to be a center point. The optical means 11a, 11b are detachably mounted to the driving means 1 by a bracket 10, and configured rotatably by 90 degrees centering on a longitudinal axis of the driving machine 1, and thereby an irradiation position of the optical means 11a, 11b can be changed.