Elachista hedemanni is a moth of the Elachistidae family. It is found from Germany to Spain and Romania. It is also found in Ukraine and Russia. The wingspan is 8–9 millimetres (0.31–0.35 in). The forewing ground colour is slightly glossy, creamy white, scattered with black scales and with three indistinct yellow longitudinal lines. The basal third of the costa is black. The hindwings are grey, with paler yellowish fringe scales.