To positively control the quantitative delivery of an object such as building industrial waste or city refuse in which miscellaneous materials different in weight per unit volume (bulk) are intermingled, with little clogging in spite of simple constitution.

In this quantitative delivery apparatus for industrial waste, a discharging cutout part 3 is formed at a lower front part 1A of a hopper 1, and a lower opening 1B of the hopper 1 is formed inclining so that its front part faces downward. A plate-like conveying body 2 is provided inclining and facing the lower opening 1B so that its front part 2A is positioned in front of the cutout part 3 and faces downward. A driving means 6 is provided for operating the conveying body to reciprocate in a longitudinal direction, and a control means 4 is provided for adjusting the operating stroke P of the conveying body 2.