A mobile drilling device for creating multiple bore holes in a building component having a plurality of stand-guided drill units spaced a distance apart from one another according to the drill pattern to be created is described. These drill units are movable relative to the building component via a feed mechanism and have a base frame on which the stand-guided drill units are secured. The base frame includes a base plate, which is spaced a distance apart from the drill units and has at least one guide opening for guiding the tools of these drill units as well as an adjusting device, which comes in contact with the building component and with which the base frame is alignable relative to the building component. In addition, a method for creating multiple bore holes in a building component is described.