Allometric equations for biomass measurement of the shrub species, Lindera obtusiloba, were developed. The allometric equations between $(BD)^2H$ and dry weight of leaves ($W_I$), stems and branches ($W_{sb}$), roots ($W_r$) and total weight ($W_t$) of the Lindera obtusiloba were as follows: $W_I=0.7318;(BD^2H)^{0.6108},;W_{sb}=0.6067(BD^2H)^{0.8355},;W_r=0.4524(BD^2H)^{0.7608},;W_t=1.672 (BD^2H)^{0.7664}$. The $R^2s$ between $(BD)^2H;and;W_I,;W_{sb},;W_r;and;W_t$ of the Lindera obtusiloba were 0.9251, 0.9571, 0.9353 and 0.9546, respectively. Root weight of this Lindera obtusiloba was about 38% of the aboveground biomass.