To easily and rapidly drill a plurality of holes.

This drilling machine includes a first slide table 3 supported by a support frame 2, a drill head 5 mounted on the first slide table 3 to impart a drilling force to a drill rod 7, a second slide table 4 located in front of the first slide table 3 along a drilling direction and supported by the support frame 2, and a guide device 6 mounted on the second slide table 4 and located in front of the drill head 5 along the drilling direction to guide the drill rod 7. The first slide table 3 causes the drill head 5 to slide relative to the support frame 2 in a direction perpendicular to the drilling direction, and the second slide table 4 causes a centralizer 6 to slide relative to the support frame 2 in a direction perpendicular to the drilling direction.