Zirconia gel fibers could be made by drawing from polyester sol containing zirconyl oxychloride during the reaction between ethylen glycol and citric acid. In this case, the critical mole ratio of zirconyl oxychloride to citric acid was about 4 and by adding CaCl2 and calcining the gel fiber in the air, cubic stabilized zirconia fibers having much micropores at surface could be obtained.