A connector is configured to be mated with and connected to a mating connector in a state where the connector is attached to an FPC having a principal surface on which a signal terminal and a ground terminal are arranged. The connector comprises a housing, a plurality of contacts held by the housing, a cover shell partially covering the housing and a lock bar supported by the housing and/or the cover shell so as to be turnable. Each of the contacts has an exposed portion connectable to the signal terminal of the connecting object. The cover shell has a grounded portion connectable to the ground terminal of the connecting object. The lock bar is configured to lock a mating state where the connector is mated with the mating connector.