Let (X, d) be a metric space, and A1, A2,. .. , Ap be nonempty subsets of X. We introduce a self map T on X, called p-cyclic orbital contraction map on the union of A1, A2,. .. , Ap, and obtain a unique best proximity point of T , that is, a point x ∈ ∪ p i=1 Ai such that d(x, T x) = dist(Ai, Ai+1), 1 i p, where dist(Ai, Ai+1) = inf{d(x, y): x ∈ Ai, y ∈ Ai+1}.