The Emscher-Niederrhein-Bahn (RB 35) is a Regionalbahn service in the German state of North Rhine-Westphalia.

Its name refers to the Emscher river (which runs near Duisburg and Gelsenkirchen) and the Lower Rhine (which the service crosses between Duisburg-Hochfeld Süd and Rheinhausen-Ost).

From the timetable change of 2016, the route was extended beyond Duisburg to Mönchengladbach, which complemented the northern section of the Rhein-Niers-Bahn.

Abellio acquired a total of 21 railcars of this class for lines RE 19, RE 19a and RB 35.

The operator maintains a workshop in the immediate vicinity of Duisburg Hauptbahnhof for rolling stock maintenance.