The removal of acid red 183 from aqueous solution onto activated carbon, raw kaolinite and montmorillonite has been studied using an agitated batch adsorber. The adsorption isotherm data were fitted to Langmuir isotherm. Parameters of Langmuir isotherm were determined using adsorption data. The adsorption capacity was 1495, 111, 29 and 19 mg dye per g adsorbent for RAC (commercial activated carbon), HAC (activated carbon obtained from hazelnut), KC (raw kaolinite) and MC (montmorillonite) at 25degreesC respectively.