Abstract: A lid open-close apparatus including: a lid openably mounted in a concave portion, which is provides at a vehicle side; a lock device for locking a closed state of the lid; and an operating element, which is disposed at the vehicle side close to the concave portion, for releasing the lock device, wherein: the lock device has a lock piece, which is provided in the lid and moves into and out of the lid from a peripheral edge thereof and is usually elastically pushed in such a way as to project from the peripheral edge thereof and engages with an engaging hole provided in an inner periphery of the concave portion; and the operating element has a pusher adapted to push a receiving portion, which is provided in a part interconnected to the lock piece, to thereby cancel engagement of the lock piece.