The sorption of phenol and its derivatives from aqueous solutions (0.12 g 1-1) on maeroporous 2,3-epithiopropyl methacrylate (ETPMA)-ethylene dimethacrylate (EDMA) copolymers has been investigated using a dynamic method. In comparison with other EDMA and divinylbenzene copolymers having an even higher specific surface area, the ETPMA-EDMA copolymers exhibit a significant ability to sorb phenol and its hydrophobic derivatives. The specific sorption ability is connected with the presence of epithio groups on the polymer chain. This assumption is supported also by the fact that the splitting of thiorane rings in the ETPMA-EDMA copolymer by the reaction with ethylenediamine produces a serious decrease in its sorption capacity towards phenol. With an increasing content of ETPMA in the copolymer, its specific surface area decreases. The opposing effects of specific surface area and epithio group concentration are responsible for the constant value of p (which provides a measure of selectivity of the sorption process) for all the copolymers tested.