A. niger, the black mold is a filamentous fungus mostly found on decaying plant materials, soil, icy grounds, marine and indoor enviroments. It plays important role in degradation and recycling of dead plant elements. It is both pathogenic and economically important fungus. As a pathogen it commonly causes ear and lungs infection in human and birds. It transmits into humans by inhalation of airborne conidia. As a economically important fungus, it plays a significant role for the industrial production of citric and gluconic acids, ?-amylase and glucose oxidase and many other enzymes.