The stand structure and the blomass of the broad leaves forest of Konara were studied in 1977 at the permanent plot set up in Hirusen training forest of Tottori University. The stand volume was calculated with the local table obtained by the equation logV = 4.5432+2.390697･logD. The total volume amounted to 160.9m^3 per ha. The relations between D.b.h. and utlilzation rate(ratio of merchantable volume to stem volume) were represented by the multi-nomial equations. The bed log(Shiitake mushroom) volume and pulp wood volume amounted to 77.4m^3 and 64.6m^3, respectively. The allometric equations of single tree were calculated by sample trees, and the biomass of upper ground in the plot were estimated by these equations. The weight of growing stock per ha in Konara was 99.0 ton, and that of banch and foliage were 20.8 ton and 5.7 ton(index of leaf area was 5.9), respectively.