A connector mateable with a mating connector which has a mating lock portion, the connector comprising a first housing, a second housing and a contact, wherein: the first housing accommodates, at least in part, the contact; the contact is provided with a cable holding portion which holds an end of a cable so that the cable extends in a predetermined direction; the second housing is attached to the first housing to hold the contact in cooperation with the first housing; the second housing is provided with a hooked portion, a spring portion, an operation portion and a lock portion; the spring portion is resiliently deformable; the operation portion and the lock portion are supported by the spring portion; the lock portion locks the mating lock portion when the connector and the mating connector are mated with each other; the hooked portion is a portion which is hooked by a finger upon operation of the operation portion; the hooked portion is positioned apart from the operation portion in the predetermined direction; the operation portion releases a lock of the lock portion against the mating lock portion when operated to be moved toward the hooked portion; the second housing is provided with a seesaw portion which is supported by the spring portion; and the operation portion and the lock portion are provided on the seesaw portion, characterized in that: the first housing is provided with a first positional regulating portion, two first upper engaging portions and two first lower engaging portions; the second housing is provided with two second upper engaging portions and two second lower engaging portions; the two second upper engaging portions are received in the respective two first upper engaging portions; the two second lower engaging portions correspond to the respective two first lower engaging portions; the seesaw portion is provided with a second positional regulating portion; the second positional regulating portion is positioned rearward of the first positional regulating portion and faces the first positional regulating portion in a front-rear direction; and when a force toward the first housing is applied to the seesaw portion, the second positional regulating portion abuts the first positional regulating portion to regulate a movement of the seesaw portion. the first housing accommodates, at least in part, the contact; the contact is provided with a cable holding portion which holds an end of a cable so that the cable extends in a predetermined direction; the second housing is attached to the first housing to hold the contact in cooperation with the first housing; the second housing is provided with a hooked portion, a spring portion, an operation portion and a lock portion; the spring portion is resiliently deformable; the operation portion and the lock portion are supported by the spring portion; the lock portion locks the mating lock portion when the connector and the mating connector are mated with each other; the hooked portion is a portion which is hooked by a finger upon operation of the operation portion; the hooked portion is positioned apart from the operation portion in the predetermined direction; the operation portion releases a lock of the lock portion against the mating lock portion when operated to be moved toward the hooked portion; the second housing is provided with a seesaw portion which is supported by the spring portion; and the operation portion and the lock portion are provided on the seesaw portion, the first housing is provided with a first positional regulating portion, two first upper engaging portions and two first lower engaging portions; the second housing is provided with two second upper engaging portions and two second lower engaging portions; the two second upper engaging portions are received in the respective two first upper engaging portions; the two second lower engaging portions correspond to the respective two first lower engaging portions; the seesaw portion is provided with a second positional regulating portion; the second positional regulating portion is positioned rearward of the first positional regulating portion and faces the first positional regulating portion in a front-rear direction; and when a force toward the first housing is applied to the seesaw portion, the second positional regulating portion abuts the first positional regulating portion to regulate a movement of the seesaw portion.