贫穷物品（英语：inferior good）在经济学上指，当一个人的实质收入下降后，将购买更多次等物品。例子有：长途汽车（相对飞机）、快餐食品（相对餐厅）。要注意的是，贫穷物品是相对的，按某人的收入水平而各有不同。一个人的贫穷物品，对于另一个相对收入低很多的人来说，可能是正常物品（英语：normal good）。

根据无差异曲线，一个消费者购买一件物品的数量可以增加、减少或不变。在图中，物品Y是正常物品。因为当收入从预算线BC1升至BC2，Y的购买量由Y1上升至Y2。而物品X则是贫穷物品。因为当收入上升，其购买量由X1下跌至X2。

In economics, an inferior good is a good that decreases in demand when consumer income rises (or rises in demand when consumer income decreases), unlike normal goods, for which the opposite is observed. Normal goods are those for which consumers' demand increases when their income increases. This would be the opposite of a superior good, one that is often associated with wealth and the wealthy, whereas an inferior good is often associated with lower socio-economic groups.