The present invention relates to a biobased barrier film for a paper or paperboard-based packaging material, said barrier film comprising: a substrate layer and a coating layer disposed on at least one surface of the substrate layer, wherein said substrate layer has a grammage in the range of 1-60 g/m2 and comprises at least 50 wt % of highly refined cellulose pulp based on the dry weight of the substrate layer, and wherein said coating layer has a grammage in the range of 1-15 g/m2 and comprises at least 50 wt % of a film forming modified starch and 0.1-10 wt % of a biobased lubricant, based on the dry weight of the coating layer.