The occurrence of Odiellus spinosus and Lacinius dentiger in Poland - two expansive harvestmen species is considered. O. spinosus was known in Poland from only one location near Poznań. New information presented in this work on the next seven locations indicate that this expansive species has already colonized large part of Greater Poland. Previously, L. dentiger was listed in Poland with 18 sites, mostly along the latitudinal belt encompassing Toruń - Eberswalde glacial valley, Bug and Narew valleys. Further 49 locations are reported here, what shows that this species is currently widespread also along the Nysa Łużycka (Neisse), Oder and the Vistula valleys.