Rhodamine B (RhB), one of the toxic dyes which are extensively used for dyestuffs, textile, paper and plastics industries. RhB does not easily biodegrades in aqueous medium and show harmful effect on aquatic as well as human life. In the present work adsorption studies of RhB onto cardboard (CB) was examined in aqueous solution at 28ºC with the effect of pH, dye concentrations and contact time. Highest 68% uptake efficiency recorded was for 10 mg/L solution concentration onto 25mg of cardboard. Langmuir and Freundlich adsorption isotherm models were applied to describe the equilibrium isotherms. The kinetic data were fitted to pseudo-second-order kinetic model and intraparticle diffusion kinetic was also investigated.