Description: The pattern semiconducting nanodispersed fractal gas sensible of an element (SE) is developed. The dodge of a delocalization of conduction electrons SE is offered at an adsorption of a molecule of gas resulting in to formation of end-to-end paths of weep of charges. The dependence of conductivity SE from variation of fractal dimension SE is received at an adsorption of molecules of gas, that is a ground of a method of fractal detection of gases.