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The fault plane solutions (FPS) of 247 seismic events were used for stress field investigation of the region. The eigenvectors <i><b>t</i></b>, <i><b>p</i></b>, <i><b>b</i></b>, and moment tensor <b>M</b> components for each FPS were defined and computed numerically. The obtained results confirm the hypothesis of subduction-type intermediate depth earthquakes for the Vrancea seismic region and this may be considered the first approximation of the stress field for the whole of the Vrancea (intermediate depth) region.