DIFFERENTIAL STRUCTURES FOR FUNCTION SPACES Piotr Multarzy\'nski Key words: Differentiable manifold; differential space; differential structure; space of smooth mappings; proper and admissible differential structures; structured spaces; Whitney topology. 1991 Math. Subject Classification: 58A40; 58D99; 53C99; 16W99; 83E05. Abstract: In this paper there are presented and analyzed different differential structures on the space of smooth mappings. It turns out that the {\em proper} structures are especially interesting since they are well organized by the partial order relation. Then there are {\em admissible} structures defined and compared with the {\em proper} structures. There are also presented differential structures induced from the spaces of jets.