Endo-polygalacturonase was purified from Jujube. The purification procedures included DEAE-cellulose ion exchange chromatography and gel filteration on Sephdex G-100. Enzyme was purified as a single protein band and purification yield was about 6%. When the purified enzyme was applied to sodium dodecyl sulfate-polyacrylamide gel electrophoresis, the molecular weight was estimated about 19,000. Purified enzyme formed hexagonal board type.