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The spectra of octet and decuplet baryons are studied using SU(3) lattice QCDat the quenched level. As an implementation to reduce the statisticalfluctuation, we employ the anisotropic lattice with $O(a)$ improved quarkaction. In relation to $\Lambda(1405)$, we measure also the mass of the SU(3)flavor-singlet negative-parity baryon, which is described as a three quarkstate in the quenched lattice QCD, and its lowest mass is measured about 1.6GeV. Since the experimentally observed negative-parity baryon $\Lambda(1405)$is much lighter than 1.6 GeV, $\Lambda(1405)$ may include a large component ofa $N \bar K$ bound state rather than the three quark state. The mass splittingbetween the octet and the decuplet baryons are also discussed in terms of thecurrent quark mass.Comment: 8 pages, 3 figures, proceeding of "International Symposium on Hadron  and Nuclei" at Yonsei Univ., Seoul, Korea 20-22 Feb. 200

SU(3) lattice QCD study for octet and decuplet baryon spectra