Variation of plant characters and correlation anlaysis of its in Bupleurum falcatum, medicinal plant, were investigated to find useful selection characters and to obtain fundamental data for breeding. The variation was generally high. In plants having high height and many branch, stem thickness was high and leaf and root weight were great. The group of short height and many branch showing low frequency was higher than that of medium height and branch showing high frequency. And the correlation between top and root characters were positively significant The major top characters correlated with root yield were stem thick-ness, branch number, node number, node position attached 1st branch(NPFB), and leaf area.