The present invention discloses a drilling machine, particularly a core drilling machine, includes a carriage (14) guided by the stand (12) so as to move toward the working direction along a guide (28) by means of a driving section (30). A drilling unit (16) having a spindle to be driven by a motor (18) is received in the carriage (14) to drive a drill (20). A driving section (30) includes a stepper motor (32).