The objective of this study was to identify and report on the occurrence of Psylloidea damaging pink cedar, Cedrela fissilis Vell. (Meliaceae), plants in the municipality of Sorocaba, in the southern region of São Paulo State, Brazil. Psyllids were collected on C. fissilis plants, and sent to authorities for identification. Psyllids damaging C. fissilis plants in urban areas and fragments of semideciduous seasonal forest were identified as Mastigimas anjosi Burckhardt, Queiroz D., Queiroz E., Andrade, Zanol Rezende & Kotrba (Hemiptera: Psylloidea: Calophyidae), which is native to Brazil. Cedrela fissilis also is endemic to Brazil, and has high ecological and economic value. It is harvested for timber production and is on the endangered species list. This is the first report of M. anjosi damaging C. fissilis plants in São Paulo State, Brazil and the importance of this plant for conservation and ecological restoration areas in Brazil justifies research to develop management programs for this psyllid.