The purpose of this study was to evaluate the intake of antioxidant vitamins and plasma concentrations of those in 60 maternal-infant pairs (30 in normal term delivery group, NT; 30 in preform delivery group, PT). We also investigated the relationship between vitamin levels of maternal-umbilical cord plasma and pregnancy outcome. Mean energy intakes of NT and PT pregnant women were 93.2% and 85.4%, and their protein intakes were 113.3% and 110.9% of the recommended dietary allowance (RDA), respectively. While vitamin A intakes were only 51.2% and 39.6% of the RDA in NT and PT pregnant women. The vitamin E intake was about 50% of the RDA (NT 6.27 mg, PT 7.78 mg). The levels of retinol in maternal plasma of NT and PT were $1.51mumol/ell;and;1.43mumol/ell$, respectively. The retinol levels in umbilical cord plasma in NT and PT were $0.72mumol/ell;and;0.61mumol/ell$, respectively. The level of $eta-carotene$in maternal plasma of NT was 0.49 $mu$mol/$ell$, significantly (p ＜ 0.01) higher than that of PT ($0.31mumol/ell$).The $eta-carotene$ of umbilical cord plasma of NT and PT were $0.702mumol/ell;and;0.01mumol/ell$, respectively. The plasma $alpha$-tocopherol of maternal of NT and PT were $0.72mumol/ell;and;0.01mumol/ell;29.51 /mumol/ell; and 27.17mumol/ell,;respectively.; The $alpha$-tocopherol of umbilical cord plasma of NT and PT were $4.16mumol/ell;and;3.80mumol/ell$, respectively. The antioxidant vitamin levels (retinol, $eta-carotene,;and;alpha$-tocopherol) in maternal plasma were significantly higher (p＜0.0001) than those in umbilical cord plasma. However, there was no correlation between the vitamin levels in maternal plasma and those in umbilical cord plasma. The maternal plasma $eta$-carotene level showed a positive correlation to gestational age. Also Apgar score at 1 min produced a positive correlation to maternal plasma $eta$-carotene level.