ABSTRACT Penicillium sp. LBKURCC34 is a fungi isolated from peat soil of primary forest at Giam Siak Kecil Bukit Batu (GSKBB), Biosphere Reserve in Riau Province. This fungus has ability to produce hydrolytic enzyme chitinase. The purpose of this study is to separate crude extract of secondary metabolites from the growth media of Penicillium sp. LBKURCC34 that have an antimicrobial activity.…