The present study was conducted to examine the effect of an increased level of dietary sodium on calcium excretion in 8 health young adult Korean women on a controlled diet. After adaptation period of 2 days, each subject received 2811.8$pm$68.1 mgNa(day during the initial period of 5 days (low sodium period) and 6417.1$pm$248.6mgNa(day during the following period of 5 days (high sodium period). Calcium intake was 593.7$pm$15.7 mg Ca/day during the low sodium period of 596.1$pm$25.1 Ca/day duing the high sodium period. When the low sodium period is compared with the high soidum period, the results were as following. 1) Mean urinary sodium excretion was significantly higher during the high sodium period (5760.1$pm$156.5mg0 than during the low sodium period (2272.2$pm$108.6mg)(P<0.001). Fecal sodium excretion of the high sodium period was also significantly higher than that of the low sodium period(P<0.001). Mean value of sodium balance during the high sodium period was higher than that of the low sodium period . However, the difference was not significant. 2) Mean urinary calcium excretion was significantly higher during the high sodium period than during the low sodium period ; mean value of the low sodium period was 124.7$pm$11.3mg and that of the high sodium period was 202.6$pm$17.2mg)P<0.001). Fecal calcium excretion was higher during the high sodium period (284.9$pm$31.0mg) than during the low sodium period (253.9$pm$15.3mg0, but there was no significance. Mean value of calcium balance during the high sodium period was significantly lower than that of the low sodium period(P<0.001). The above results show that high sodium intake increases calcium excretion as well as sodium excretion.