The adsorption behaviour of herbicide linuron in four soils differing in their physico-chemical properties, has been studied using a batch technique. Adsorption data could be fitted to a Freundlich-type equation. The value of the exponent in the fitted Freundlich isotherms varied from 1.11 to 1.28, and K f varied widely for four soils (from 3.88 to 93.84). Adsorption was found to be better correlated with five times OM% plus Clays% after dividing soil pH value (r=0.996). The adsorption from chloroform solution of linuron on Fe 3 + , Al 3 + , Ca 2 + and K + exchanged bentonite sample was also investigated. The some bonding mechanisms, hydrogen-bond, coordination bond and ionic bond, between herbicide to soil components were supposed.