To provide a supply device for a long-size material to be worked capable of safely housing a long-size material to be worked, such as a pipe material, into a stocker part, and safely taking out the material to be worked one by one from the stocker part for supplying.

An elevating member of a pushing up device is installed, in the vertical frame portion 23a of an enclosure part 23 along the longitudinal direction of a pipe material 2, in a stocker part 21 for storing the many long- size pipe materials 2; and the many pipe materials 2, stocked in the stocker part 21, are pushed up one by one by the elevating member, from the stocker part 21 to an upper part than it, to be pushed up and transfered onto a supply shelf 25, arranged on the upper end outer part side of the frame portion 23a, to move the supply shelf 25, thereby being supplied to a feed gear 27.