This studies were carried out to investigate the changes of blood pictures within 24hrs after birth in Korean native calves. The hematologic values were examined from 300 heads healthy Korean native calves in the area of western farm of Chungnam province. The results obtained are summarized as follows : 1. $Mean{pm}SD$ values of serum total protein contents within 24 hrs after birth in Korean native calves were $8.42{pm}0.92g$ / dl and 48.14{pm}0.93g$ / dl, respectively. 2. $Meant{pm}SD$ values of RBC count, WBC count, PCV and Hb contents within 24 hrs after birth in Koren native natives were 49.97{pm}2.56{ imes}10^3$ / mm^3$ and $9.88{pm}2.93{ imes}10^3/ mm^3, $ 439.56{pm}15.42%$ and 441.66{pm}7.09 %, $$ 12.79{pm}1.59g$ / dl and 13.$63{pm}1.87g$ / dl, respectively. 3. 4Meant{pm}SD$ values of MCV, MCH and MCHC within 24 hrs after birth in Koren native calves were $43.41{pm}3.09{mu}mm^3$ and $43.88{pm}3.31{mu}mm^3, $ $14.05{pm}1.22pg $and 414.36{pm}1.6pg, $ $32.46{pm}2.47g$ / dl and 432.96{pm}3.17g$ / dl, respectively.