In a connector provided with a main body including a plurality of contacts arranged in parallel in a first direction and a housing holding the contacts, an operating member is coupled to the main body and is rotatable between an open position at which a connection object is allowed to be inserted into the main body and a closed position at which the contacts are contacted to the connection object. The operating member has a rib inserted between adjacent ones of the contacts and a recessed portion adjacent to the rib in a rotating direction. The housing has a protruding portion to be inserted into the recessed portion when the operating member is at the open position. The rib at least partially approaches the protruding portion when the operating member is at the closed position.