In the present study, effects of concentration of cryoprotectant solutions on the nuclear maturation of vitrified-thawed porcine oocytes were examined. Also, the developmental capacity of vitrified-thawed immature porcine oocytes following ICSI was investigated. Oocytes were cultured in NCSU-23 medium supplemented with 5% FBS at $38^{circ}C$ in 5% $CO_2$ and air. The in vitro maturation rate of vitrified-thawed oocytes ($24.1{pm}2.5%$) was lower than that of the control ($46.0{pm}3.2%$, p<0.05). The in vitro maturation rate of vitrified-thawed oocytes treated with $1.0{sim}5.0;ug$ CB + NCSU- 23 medium were $22.2{pm}3.0%$, $30.7{pm}3.2$, $46.3{pm}3.1%$, $38.5{pm}3.2%$, respectively. The in vitro maturation rate ($46.3{pm}3.4%$) of the vitrified-thawed oocytes treated with $3.0;{mu}g$ CB for 30 min was the highest of all vitrification groups. When the in vitro developmental rates of the vitrified-thawed (with EDS and EDT) oocytes following ICSI were $18.5{pm}2.5%$, $16.4{pm}2.1%$, respectively. This results were lower than the control group ($24.0{pm}2.5%$).