To overcome a problem that positioning by drilling in a conventional drilling machine is troublesome in operation since a drill is lowered and is adjusted to a punch attached to a base material and adjustment of depth drilled by the drill is troublesome in operation since it is adjusted by a screw provided at a spindle head.

In the positioning of the drilling machine, an intersection 4d where a laser light X surface 4x crosses with a laser light Y surface 4y is adjusted to a marked position, a position to drill is discerned so that a process for driving the punch on a mark is eliminated. The depth drilled by the drill 3b is indicated by a digital type slide caliper mounted instead of the screw.