LGV大西洋線
The station serves intercity TGV trains to the west and southwest of France including Tours, Bordeaux, Rennes and Nantes, and suburban and regional services on the Transilien Paris – Montparnasse routes. There is also a metro station. Gare Montparnasse is the only mainline terminus in Paris not directly connected to the RER system, though the Montparnasse main line is connected to the RER at Versailles-Chantiers and the LGV Atlantique at Massy Palaiseau.