A drug product filling device (110) for filling at least one drug product into containers is proposed. The drug product filling device (110) comprises : a) at least one drug product preparation device (112), the drug product preparation device (112) being configured for preparing the liquid drug product; b) at least one filling station (114) for filling the liquid drug product into the containers, the filling station (114) being fluidically coupled to the drug product preparation device (112); and c) at least one degassing device (116), the degassing device (116) being fluidically interposed in between the drug product preparation device (112) and the filling station (114) and the degassing device (116) comprising at least one membrane (118) for at least partially separating off at least one gas from the liquid drug product.