Pure poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) and zinc oxide (ZnO)/PHBV composite nanofibers were fabricated by an electrospinning method.ZnO nanoparticles (NPs) with a diameter of about 10-20 nm were doped in the PHBV fibers and no dispersion agent was utilized.Both pure PHBV and composite electrospun fibers were smooth and uniform.ZnO NPs did not affect the basic crystalline structure of electrospun PHBV fibers.