Perenniporia minor is a poroid fungus in the family Polyporaceae.

The type specimen was collected in Changbaishan Nature Reserve in Jilin province, where it was found growing on fallen angiosperm branches at an altitude of 1,100 metres (3,600 ft).

The colour of the cap surface is initially pale buff, darkening slightly with age.

The pores on the undersurface of the cap and tiny and round, numbering 4–6 per millimetre.

Microscopically, the fungus is characterized by the almost negative reaction of the skeletal hyphae to Melzer's reagent.