A device for introducing a bead-like indentation into a wall region of a pipe, having: a clamping apparatus for the rotationally-fixed clamping of the pipe, so that the wall region of the pipe is freely accessible; a rotatably mounted drive shaft having an end facing the clamping apparatus, the drive shaft being aligned in such a manner that the rotational axis thereof is flush with the longitudinal axis of the clamped pipe; a first drive apparatus for rotationally driving the drive shaft; a cup-shaped guide head having a sleeve-shaped wall, the guide head being mounted concentrically to and in a rotationally-fixed manner on the drive shaft and is open towards the clamping apparatus; a tool head mounted in a rotationally-fixed manner on the end of the drive shaft facing the clamping apparatus; a support roller holding apparatus having a freely rotatable support roller with profiling on the circumference thereof, which is constructed in a complementary manner with respect to the desired indentation, for rolling on the outer side of the wall region of the pipe; and a freely rotatably mounted internal rolling mandrel for end-side introduction into the pipe; characterized in that the sleeve-shaped wall of the guide head has a first conical guide surface on the inner side thereof extending in the axial direction in a first circumferential angular direction (α1); in that a holding apparatus for the internal rolling mandrel, which holding apparatus can be displaced radially on the tool head, wherein the holding apparatus has a conical sliding surface on the radial outer side thereof for sliding along on the first conical guide surface of the sleeve-shaped wall of the guide head; and in that a second drive apparatus is provided for the axial displacement of the guide head relatively to the tool head and the holding apparatus for the internal rolling mandrel and thus for the radial adjustment of the internal rolling mandrel from the interior with respect to the wall region of the pipe. a clamping apparatus for the rotationally-fixed clamping of the pipe, so that the wall region of the pipe is freely accessible; a rotatably mounted drive shaft having an end facing the clamping apparatus, the drive shaft being aligned in such a manner that the rotational axis thereof is flush with the longitudinal axis of the clamped pipe; a first drive apparatus for rotationally driving the drive shaft; a cup-shaped guide head having a sleeve-shaped wall, the guide head being mounted concentrically to and in a rotationally-fixed manner on the drive shaft and is open towards the clamping apparatus; a tool head mounted in a rotationally-fixed manner on the end of the drive shaft facing the clamping apparatus; a support roller holding apparatus having a freely rotatable support roller with profiling on the circumference thereof, which is constructed in a complementary manner with respect to the desired indentation, for rolling on the outer side of the wall region of the pipe; and a freely rotatably mounted internal rolling mandrel for end-side introduction into the pipe; characterized in that the sleeve-shaped wall of the guide head has a first conical guide surface on the inner side thereof extending in the axial direction in a first circumferential angular direction (α1); in that a holding apparatus for the internal rolling mandrel, which holding apparatus can be displaced radially on the tool head, wherein the holding apparatus has a conical sliding surface on the radial outer side thereof for sliding along on the first conical guide surface of the sleeve-shaped wall of the guide head; and in that a second drive apparatus is provided for the axial displacement of the guide head relatively to the tool head and the holding apparatus for the internal rolling mandrel and thus for the radial adjustment of the internal rolling mandrel from the interior with respect to the wall region of the pipe.