The content of selected micro- and trace elements in oat flakes was investigated in 14 samples (8 domestic, 6 foreign) including regular, instant and so called „ecological” ones. Iron, manganese, zinc, copper and so called heavy metals (chromium, cadmium, nickel and lead) content was analyzed. Lead content was exceeded in one sample, which was also characterized by elevated level of copper. There was no significant difference in cadmium and copper content between normal and “ecological” flakes. Domestic flakes were characterized by lower level of iron, zinc and nickel as compared to foreign ones, but on the other hand lead level was higher. Content of manganese, copper and cadmium was not influenced by the origin of the flakes.