Abstract: The present invention relates to drilling equipment. The portable drilling machine comprises a derrick having longitudinal racks guiding a vertical traverse mechanism carrying a traverse having a means designed for rotation of a drill pipe during the drilling operation, sand pipe being positioned longitudinally in the derrick in alignment with the drilling axis; a pulldown unit connected through a closed flexible transmission with the vertical traverse mechanism and the traverse to feed, during the working run thereof, the drill pipe to the bottom of the hole and, during the reverse run thereof, raise the drill pipe, and a clamp designed for gripping the drill pipe on completion of the working run of the vertical traverse mechanism and the traverse and being mounted at the base of the derrick.