In this paper, we …rst give a new de…nition of-Dedekind complete Riesz space (E;) in the frame of vector metric space (; ; E) and we investigate the relation between Dedekind complete Riesz space and our new concept. Moreover, we introduce a new contraction so called-vector proximal contraction mapping. Then, we prove certain best proximity point theorems for such mappings on vector metric spaces (; ; E) where (E;) is-Dedekind complete Riesz space. Thus, for the …rst time, we acquire best proximity point results on vector metric spaces. As a result, we generalize some …xed point results proved on both vector metric spaces and partially ordered vector metric spaces. Further, we provide nontrivial and comparative examples to show the e¤ectiveness of our main results.