Abstract: A powder puff casing includes a bottom casing for receiving therein powder, a positioning cover detachably mounted on top of the bottom casing and having a circular hole defined therethrough to communicate with an interior of the bottom casing, a covering extending through the hole of the positioning cover and having multiple through holes defined therethrough to communicate with the interior of the bottom casing and the hole of the positioning cover, a porous sponge rested on top of the covering, a puff enclosing the porous sponge such that the powder is able to seep through the through holes, the hole and the voids to be evenly distributed on a top face of the puff and a cover detachably connected to the positioning cover to enclose therein the puff, and the porous sponge.