The crossllnked poly(4-vinylpyridine) was examined for its ability to bind methyl orange at various temperatures in ethylene glycol. The first binding constants(K1) were evaluated. These values were compared with those of aqueous solution. It was found that the values of Kl in ethylene glycol were smaller than those in aqueous solution and the values showed a bell-shaped curve against the binding temperature. These results are discussed in terms of the swelling degree and the crosslinked hole size.