The present invention disclosed a composition for enhancing immune function comprising, as active ingredients, zinc and a saccharide having 3-O-±-D-glucopyranosyl-D-glucose as a structural unit. The composition for enhancing immune function according to the present invention exhibits a remarkably superior immunoenhancing effect to that achieved by the independent use of zinc and a saccharide having 3-O-±-D-glucopyranosyl-D-glucose as a structural unit.