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±SD values of serum total protein contents within 24 hrs after birth in Korean native calves were 8.42± 0.92g / dl and 8.14± 0.93g / dl, respectively. 2. Mean±SD values of RBC count, WBC count, PCV and Hb contents within 24 hrs after birth in Koren native calves were 9.97±2.56×103/ mm3 and 9.88±2.93×103/ mm, 39.56±5.42 % and 41.66 ± 7.09 %, l2.79±l.59g / dl and l3.63±l.87g / dl, respectively.3. Mean±SD values of MCV, MCH and MCHC within 24 hrs after birth in Koren native calves were 43.41+3.O9pmm3 and 43.88+3.31umm3, l4.05±1.22pg and l4.36±1.6pg, 32.46±2.47g / dl and 32.96±3.17g / dl, respectively.