Using an agricultural waste rapeseed meal (RM) as adsorbent, the adsorption of methylene blue (MB) and malachite green (MG) from aqueous solution has been studied. For this purpose, the adsorption of MB and MG onto the RM with aspects of kinetics, equilibrium and the effect of pH were investigated. The equilibrium experimental data of MB and MG is in well accordance with isotherm equations of Langmuir and Freundlich. And the maximum uptake capacities (qm) of MB and MG were 122 and 78 mg.g-1respectively. It was observed that the adsorption rate of MB and MG onto the RM were very rapid and the adsorption process followed the pseudo-second-order equation. The RM appears as a very prospective adsorbent for the removal of cationic dyes from industrial effluent due to its high uptake, rapid adsorption rate and low cost.