A plug connector for the producing of hose- and/or tube-connections, including a base body and a receiving body, which each include a plug-in channel (6, 8) for a plug part to be installed in a plug-in direction, furthermore including a retaining part, which is disposed in a receiving opening of the receiving body and, in a locking position, block the to-be-installed plug part against the plug-in direction, wherein the receiving body is connected to the base body, wherein the retaining part includes a stop surface facing against the plug-in direction, wherein the receiving opening includes an abutment surface facing in the plug-in direction, wherein with a displacing of the retaining part against the plug-in direction, the stop surface acts against the abutment surface of the receiving body, wherein the receiving body is designed to be elastically deformable such that the abutment surface is elastically displaceable against the plug-in direction at least inside a displacing region, wherein the receiving body includes a resistance element which, during a displacing of the abutment surface beyond the displacing region, generates a resistance against a further elastic deforming of the receiving body against the plug-in direction, wherein the resistance element is configured as an anvil arm extending in the receiving body parallel to the plug-in direction, which is connected or formed-on in a material-bonded manner at least one-side with the receiving body, and is disposed with at least one end in an anvil receptacle in the receiving body, wherein between a contact section on at least one end of the anvil arm and a correspondingly configured contact surface of the anvil receptacle a gap is formed that decreases with a displacing of the abutment surface, and with an abutment contact of the contact section with the contact surface increases the resistance against a further deforming of the receiving body against the plug-in direction. wherein the receiving opening includes an abutment surface facing in the plug-in direction, wherein with a displacing of the retaining part against the plug-in direction, the stop surface acts against the abutment surface of the receiving body, wherein the receiving body is designed to be elastically deformable such that the abutment surface is elastically displaceable against the plug-in direction at least inside a displacing region, wherein the receiving body includes a resistance element which, during a displacing of the abutment surface beyond the displacing region, generates a resistance against a further elastic deforming of the receiving body against the plug-in direction, wherein the resistance element is configured as an anvil arm extending in the receiving body parallel to the plug-in direction, which is connected or formed-on in a material-bonded manner at least one-side with the receiving body, and is disposed with at least one end in an anvil receptacle in the receiving body, wherein between a contact section on at least one end of the anvil arm and a correspondingly configured contact surface of the anvil receptacle a gap is formed that decreases with a displacing of the abutment surface, and with an abutment contact of the contact section with the contact surface increases the resistance against a further deforming of the receiving body against the plug-in direction.