A space is called Dieudonné complete if it is complete relative to the maximal uniform structure compatible with its topology. In this paper, we investigated when the function space C(X,Y) of all continuous functions from a topological space X into a uniform space Y with the topology of uniform convergence on a family of subsets of X is Dieudonné complete. Also we proved a generalization of the Eberlein-Šmulian theorem to the class of Banach spaces.10 page