A chair-raising and folding construction is disclosed, which is simple in construction and reduced in weight, and which is capable of, when using a moving stand with lower stages of decks protracted, effectively preventing spectators, etc. from entering into non-used decks protracted. The moving stand telescopically accommodates and protracts a plurality stages of decks (1, 2). Each of the decks (1, 2) has a plurality of chairs (3) raisaby and foldaby. A leg portion (5) of the chair (3) is hinge-connected to a base frame (4) disposed on the deck (1). A crank member (10), comprising a swing arm (12) protruding upward from the base frame (4), and a hook (13) protruding forward from a lower end portion of the swing arm (12), is rotatably supported at a corner portion thereof. The swing arm 12 has such a protruding length as that a distal end portion thereof abuts against a front end surface (2a) of the upper stage-side deck (2). The leg portion (5) is provided with a lock member (9) engaged with the hook when the leg portion takes the raised attitude.