The feeder connector is designed to prevent incomplete engagement of the feeding and receiving side connectors and to facilitate connection work when charging an electric car. The feeder connector comprises a feeding side connector A on the power supply apparatus side and a receiving side connector B on the car body side. The feeding side connector A has a connector body 1, a protective case 2 and a lock lever 12. The protective case 2 consists of a main case 2A made up of a cylinder portion 3, a half-cylinder portion 4 and a trough portion 5, all formed integral, and a subcase 2B. The connector body 1 is formed integral with the cylinder portion 3 of the main case 2A through a flange 19 formed along the periphery of the body. An opening 11 is formed ranging from the cylinder portion 3 of the main case 2A to the subcase 2B. In this opening 11, a lock lever 12 for the receiving side connector B is rotatably provided.