The removal of Congo Red (CR) from an aqueous solution, using aromatic polythioamide resin (PTA) was studied. The effective pH and equilibrium time for the maximum adsorption of the CR on the PTA is found to be 7 and 45min, respectively. Among the three kinetic models studied, the pseudo-second order kinetic model describes adsorption of the CR on the PTA efficiently. The maximum adsorption capacity of PTA for CR calculated from the Langmuir isotherm is 452.1mg/g. The surface morphology of the PTA and dye adsorbed PTA were determined using scanning electron microscopy. The adsorption efficiency of the PTA was retained even after four cycles.