The purpose of this study is to analyze of the vibration characteristic of submerged vehicle to obtain the anti-vibration design data, which could be used in the preliminary design stage data. Underwater pressure hull of submerged vehicle is used as the model of this study. The F.E.M. model is meshed by shell and beam element Also, considering of the inner hull weight, mass element is distributed in the direction of length. Numerical calculations are accomplished using the commercial B.E.M. code. The characteristics of natural frequency(eigenvalues), mode shape(eigenvectors) and frequency-displacement response are analyzed The results of this study will be used as the useful design data in preliminary anti-vibration design stage.