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 for a plug part to be installed in a plug-in direction (E), 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 (E), wherein the receiving body is connected to the base body , wherein the retaining part includes a stop surface facing against the plug-in direction (E), wherein the receiving opening includes an abutment surface facing in the plug-in direction (E), wherein with a displacing of the retaining part against the plug-in direction (E), 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 (E) 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 (E), wherein the resistance element is configured as an anvil arm extending in the receiving body parallel to the plug-in direction (E), 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 (E), wherein with a displacing of the retaining part against the plug-in direction (E), 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 (E) 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 (E), wherein the resistance element is configured as an anvil arm extending in the receiving body parallel to the plug-in direction (E), 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. <EOS>