An automatic roll changer including a reel stand having a holder. At least one roll of material is rotatably mounted in that holder. A transport device is provided for transporting either at least one new material roll or at least one spent reel casing from which the material originally on the reel casing has been at least partially unwound. The transport device is adapted to more transversely to the longitudinal axes of the mounted material reel and underneath the reel stand.