Fomitiporella caviphila L.W. Zhou (Hymenochaetales, Basidiomycota) sp. nova is described and illustrated from eastern China. Its perennial, resupinate and inseparable basidiocarps, thin subiculum, stratified tubes, a dimitic hyphal system, lack of setae, and brown basidiospores fit well to the current concept of Fomitiporella. The new species resembles F. cavicola by inhabiting cavities of living logs and having thick basidiocarps, but it differs by the lighter pore surface, smaller pores and smaller basidiospores. In DNA analysis, F. caviphila is nested within the clade including the generic type, F. umbrinella. The current phylogeny does not support F. caryophylli and Phylloporia resupinata as members of Fomitiporella.