A method for producing a brush which comprises a bristle carrier made of thermoplastic resin having a front side and a rear side and at least one anchoring opening into which at least one bristle made of thermoplastic resin is inserted and anchored therein without using an anchor, so that it protrudes from the front side of the bristle carrier, wherein the anchoring opening has, on the front side thereof, a front-face rim encompassing the anchoring opening, characterized by the following steps: a) a bristle carrier is provided which has, only in sections in the area of the front-face rim, at least one protrusion extending away from the front side in order to create an accumulation of material, wherein the at least one protrusion is produced during injection moulding of the bristle carrier and extends only over part of the periphery of the front-face rim, b) the at least one bristle is accommodated in a receiving opening of a tool part, c) while the at least one bristle is still located in the receiving opening, it is inserted by its fastening end into an anchoring opening in the bristle carrier, which has been formed during producing the bristle carrier, d) the distance of the tool part from the bristle carrier is reduced, so that the tool part contacts the bristle carrier, e) the tool part applies a pressure force on the bristle carrier and reshapes the bristle carrier at least in the region of the front-face rim encompassing the anchoring opening including the at least one protrusion while reducing the cross-section of the anchoring opening such that the at least one bristle is embedded in the anchoring opening and anchored therein and, in the process, a material of the bristle carrier in the region of the rim on the at least one protrusion laterally moves into the anchoring opening during reshaping, and presses against the at least one bristle, and f) the distance of the tool part from the bristle carrier is enlarged, so that the at least one bristle is pulled out of the receiving opening. a) a bristle carrier is provided which has, only in sections in the area of the front-face rim, at least one protrusion extending away from the front side in order to create an accumulation of material, wherein the at least one protrusion is produced during injection moulding of the bristle carrier and extends only over part of the periphery of the front-face rim, b) the at least one bristle is accommodated in a receiving opening of a tool part, c) while the at least one bristle is still located in the receiving opening, it is inserted by its fastening end into an anchoring opening in the bristle carrier, which has been formed during producing the bristle carrier, d) the distance of the tool part from the bristle carrier is reduced, so that the tool part contacts the bristle carrier, e) the tool part applies a pressure force on the bristle carrier and reshapes the bristle carrier at least in the region of the front-face rim encompassing the anchoring opening including the at least one protrusion while reducing the cross-section of the anchoring opening such that the at least one bristle is embedded in the anchoring opening and anchored therein and, in the process, a material of the bristle carrier in the region of the rim on the at least one protrusion laterally moves into the anchoring opening during reshaping, and presses against the at least one bristle, and f) the distance of the tool part from the bristle carrier is enlarged, so that the at least one bristle is pulled out of the receiving opening.