The effect of glucose and other soluble sugars (xylose, fructose, maltose, cellobiose and lactose) in the production of amylases by Aspergillus tamari was studied in solid state fermentation (SSF). Wheat bran solid state cultures were resistant to catabolite repression even at high concentration of glucose (10%). Results show the potential of solid state systems to overcome the adverse effects of high sugar concentrations in the media. The ability to prevent catabolite repression appear to be related with the content moisture of solid state systems: less content moisture of cultures means less catabolite repression caused by glucose