Abstract: A rock anchor consists of a body member formed as a drilling-rod (1), which at one end carries a drill-head (2) and has externally over its whole length a coarse thread, for example an approximately round thread (3). The drill-head (2) is welded to the drilling-rod (1). The drilling-rod (1) has only at its forward region, that is adjacent the drill-head (2) peripheral bores (6), whereby the aforesaid forward region, from the drill-head (2), extend over a length of at most 20 cm. The bores (6) extend at an angle to the axis of the drilling-rod (1), namely, from inside to outside in a direction from the drill-head (2). This rock anchor serves simultaneously for making a drilling, whereby the tubular body member serves for the supply of the hydraulic fluid, which passes into the bore-hole via an hydraulic bore (5) in the drill-head (2) and the aforesaid peripheral bores (6) and passes back to the outside of the drilling-rod (1) with the drilling fines produced.