Chlorinated benzenes (CB) can enter the environment as a waste product of the electro-industry and as a result of its use as a solvent, pesticide, heat transfer fluid, flame retardant and chemical intermediate as well as from side reactions in the production of chlorinated compounds, waste water chlorination and from lindane and HCB transformation. Because of their lipophylic character and slow degradation in the envirnonment they may accumulate in the food chain. Little data on fish contamination with CB are reported. In the present contribution, capillary GLC was used for the determination of CB residues in fish. This method is convenient as better separation is obtained from interfering substances.