Ion exchange resin with bis(carboxymethyl) amino groups synthesized on the base of acrolein copolymer is found to be effective sorbent of lysozyme and does not absorb bovine serum albumine. Sorption of lysozyme is characterized by high values of distribution coefficients increasing with equilibrium concentration decrease, the sorption being performed from the solutions with 0.15 M salt concentration at pH value about 7. Lysozyme can be desorbed quantitatively from the resin by buffered weak acidic solution, completely remaining enzymatic activity.