An analysis of the European invasions of the leaf mining Lepidoptera Phyllonorycter platani (S t a u d i n g e r 1870), P leucographella (Z e l l e r 1850), P. issikii (K u m a t a 1963), P. robiniella (C l e m e n s 1859), P. medicaginella (G e r a s i m o v 1930) and Cameraria ohridella D e s c h k a, D i m i ć 1986. Their possible common ecological requirements as preconditions of invasions, kinds of spread and factors influencing their speed and host impact are discussed. Both positive and negative parts of above species, e.g. increase of species diversity and possible damages are evaluated.