The processes of Mn(II) ions sorption from water solutions of chlorides salts on the mildly acidic cationites KB-4 and highly acidic cationites KU-1, KU-2, KU-2-8 have been investigated. The kinetics of sorption has been studied, temperature dependences have been determined and activation energies of sorption processes have been worked out. The constants of Mn2+ ions adsorption have been found and the Gibbs energies of sorption processes have been figured out.