Stabilities of Ca-alginatc fiber and ACP(Alginate + Cclitc R-634 + Pectin) gel fibers containing different concentrations of alginatc w'crc tested. The results showed that the stability of ACP gel fiber containing 5% alginate(5% ACP gel fiber) was better than those of other fibers tested, considering the degree of release of yeast from gel fiber. Scanning electron microscopic observation proved the above results, and concentrations of ccl1 and ethanol obtained by 5% ACP gel fiber \vere higher than those of others, respectively.