Machaerium villosum is an important tree species from Southeastern Brazil. We report hereby 10 new microsatellite markers to investigate the structure and genetic diversity of this species. Ninety-seven alleles were detected in 60 specimens from a natural population in Minas Gerais State. High genetic diversity has been found. The mean observed and expected heterozygosities were 0.771 and 0.802, respectively. One locus showed significant Hardy-Weinberg departure and five loci combinations showed significant linkage disequilibrium. These 10 new microsatellite loci will be used to evaluate the genetic diversity of this species in order to understand the fragmentation effects of the Brazilian Atlantic Rain Forest.