Heavy metal concentrations were investigated in liver and kidney tissues of Carassius carassius. Liver and kidney tissues of these fish was exposed to routine histological process. The concentrations of metals which included Fe, Zn were determined liver and kidney tissue samples using Atomic Absorption Spectrophotometer. Fe and Zn levels in liver and kidney were measured as 1296.10 +/- 57.91, 507 +/- 24.92, 997.81 +/- 41.53 and 408.23 +/- 10.38. Toxic effects of heavy metals in liver and kidney tissues histopathological evaluation was performed with a light microscope.