The problem of the statical deflection of a rhomboidal plate with clamped edges subjected to uniformly distributed pressure, is studied in this paper on the basis of the energy method, which was once used by one of the authors in the eigenvalue problems. As numerical examples, the deflection and the bending moments at the center of the plate, and the maximum bending moments along the edges are calculated for three oblique angles-75°, 60° and 45°.