Material reduction detection device

A material reduction detection device (1) is provided with: an inclined support section (13) which is disposed in an inclined shape so as to support a bag (9) that accommodates a powder material in an inclined state; and a material detection unit (22) that detects the material level inside the bag body from the outside of the portion of the bag body along the inclined support unit. 材料减少检测装置(1)具备：倾斜支承部(13)，被配设为倾斜状，以将收容粉粒体材料的袋体(9)以倾斜状态支承；以及材料检测部(22)，从沿着上述倾斜支承部的上述袋体的部位的外侧检测上述袋体内的材料水平。