Abstract: Cladosporium cladosporioides No. 9 produces a fragrant flavor like a ripe banana in culture medium. The formation of neutral fraction of aroma concen-trates has been studied in a synthetic medium with glucose as a sole carbon source. Neutral fraction of aroma concentrates in the ether: n-pentane (3:1) extract of culture broth were analyzed by both gas- and paper chromatographies. Following com-pounds were tentatively identified; methyl, ethyl, tert-butyl, isopropyl, n-propyl, isobutyl, n-butyl, isoamyl, n-amyl, n-heptyl, n-octyl and β-phenyl-ethyl alcohols, ethyl acetate, isopropyl acetate, ethyl isovalerate, ethyl lactate, isobutyl acetate, isoamyl acetate, ethyl n-valerate, isobutyl n-butyrate, ethyl n-caproate, ethyl n-capryate, isoamyl n-butyrate, ethyl laurate, β-phenylethyl acetate and acetalde-hyde.