PURPOSE: To enable the feed of a machining material to a processing machine and the placing and storing of the material after machined in a specific bucket by equipping a feed conveyor, a delivery conveyor and a storage conveyor.

CONSTITUTION: A feed conveyor 1 is so made as to be movable in circulation, with a plurality of machining materials 16 aligned thereon. A delivery conveyor 25 comes in and out of the transportation area of the feed conveyor 1 for the receipt and delivery of the machining material 16 from and to said conveyor 1, the feed and feed-back of said material 16 to and from a direction crossing the transportation direction of said conveyor 1. A storage conveyor 131 makes it possible to move intermittently in circulation a plurality of buckets 174 whose vertical and side openings are closable. By means of the aforesaid conveyors, it is possible to feed the machining material 16 back to the feed conveyor 1 after feeding the constant quantity thereof. Also, the material after machined can be stored and kept in a specific bucket.