A drilling tool, in particular a twist drill, has a substantially cylindrical main body formed with a shank portion, a cutting-edge portion having a drill diameter, and a drill end. The drilling tool is rotatable in a direction of rotation about a drill longitudinal axis. At least two flutes extend in a twisted manner along the drill longitudinal axis and are inclined with at least one helix angle. The flutes form a chip space. Webs are formed between the flutes with a web width. The chip space is formed with a chip space extension that enlarges the chip space in at least part of at least one of the flutes. The web width is reduced in the region of the chip space extension.