The water absorption properties of concretes measured by sorptivity test were investigated by using natural pozzolanic cementsCEM II/A and CEM II/Band compared with those of ordinary portland cement (CEM I) concrete under varying water-curing periods. The mix design of concretes was made with an equal strength base at an age of 28days under standard curing. The curing regimes include initial water curing periods of 3, 7, 14, and 28days between continuous in-air and continuous in-water, and also 7-day delayed curing. Sorptivity and compressive strength tests were conducted at the age of 90days. Although the difference between the sorptivities of air-cured concrete specimens for all cement types used is slight, under the water curing conditions, the differences between that of the CEM II/B concrete and those of the CEM I and CEM II/A concretes become significant. Also, considerable differences were obtained for the sorptivities of the CEM II/B concrete between the air-cured and continuous water-cured specimens when compared with those of the CEM I and CEM II/A concretes.