A material placement device is configured for placement of a plurality of materials from the preceding process, and includes a slide rail assembly configured to be disposed on one side of an aisle of a place, a plurality of storage units slidably disposed on the slide rail assembly and movable toward or away from each other, and a plurality of fixing units each of which detachably fixes two adjacent ones of the storage units. Each storage unit includes a storage portion defining a plurality of storage spaces for receiving and storing the materials.