To provide a polishing machine for a denture capable of improving a recovery rate of a dental material and preventing a decrease in a working environment by preventing scattering of a polished powder generated from a polishing material or the denture.

The polishing machine for the denture for finishing a surface of the denture 12 formed based on a clinical impression acquired gypsum toothform cast in a mirror surface manner comprises a central shaft 3 maintainable to radially project a plurality of dentures 12 at a predetermined interval in an axially central direction, a case 4 rotatably supported around the shaft 3 to be charged by a polishing material 14, and a cover 15 covering the shaft 3 and the case 4. The machine further comprises an inner wall 16 disposed in the cover 15 to cover the case 4, and a polishing powder recovery case 19 having a volume larger than a capacity of the material 14 charged in the case 4 at a lower end of a space formed by the wall 16.