Lattice QCD Spectroscopy with an Improved Wilson Fermion Action

We study the hadronic spectrum in quenched lattice QCD using an improved Wilson fermion action (Hamber-Wu(1983),Eguchi-Kawamoto(1984)) at $\beta =5.7$ and $\beta =6.0$. We find a systematic reduction of the finite spacing effects compared to the results obtained by using the standard Wilson action.