The conodonts from the Carboniferous Limestone (Kohlenkalk) of the Velbert Anticline in the Rhenish Slate Mountains (W. Germany) and from the nodular limestone of the Genicera Formation in the Cantabrian Mountains (NW. Spain) are analyzed to study their biofacies. Among conodonts from the Carboniferous Limestone are Gnathodus and Paragnathodus very abundant. Together with these conodonts, Mestognathus, Cavxsgnathus and Eotaphrus, which occur commonly in shallow-water, high-energy environment, are produced from the biosparitic limestone of the Kohlenkalk. From the nodular limestone of the Genicera Formation are yielded Gnathodus and Paragnathodus, which are known to indicate a deep-water, low-energy environment. It could be interpreted that the Carboniferous Limestone of the Velbert Anticline has deposited in a relatively shallow, high-energy environment, whereas the nodular limestone of the Genicera Formation has developed in a low-energy, pelagic environment.