| Founded | 1949 |
|---|---|
| First season | 1949–50 |
| Country | France |
| Confederation | FIBA Europe |
| Number of teams | 18 |
| Level on pyramid | Level 3 |
| Promotion to | Élite 2 |
| Relegation to | NM2 |
| Current champions | Metropolitans 92 (1st title) |
The Nationale Masculine 1, abbreviated as NM1, (English: National Male 1), is the professional level third-tier division of men's club basketball in France. The two top teams from each season of the competition are promoted to the Élite 2, which is the French second division. The competition is organized by the French Basketball Federation (FFBB).
| Season | Champions | Other promoted teams |
|---|---|---|
| 2009–10 | Reims Champagne | SOM Boulonnais |
| 2010–11 | JSA Bordeaux | Saint-Etienne |
| 2011–12 | Saint-Quentin | Étoile Charleville-Mézières |
| 2012–13 | BC Orchies | Souffelweyersheim |
| 2013–14 | Monaco | Angers Étoile Charleville-Mézières |
| 2014–15 | Saint-Chamond | JA Vichy |
| 2015–16 | Blois | AMSB |
| 2016–17 | Caen Calvados | UJAP Quimper 29 |
| 2017–18 | Gries Oberhoffen | Chartres |
| 2018–19 | Souffelweyersheim | Saint-Quentin |
| 2019–20 | Cancelled due to COVID-19 pandemic | |
| 2020–21 | ||
| 2021–22 | Angers | Stade Rochelais |
| 2022–23 | Rouen | AS Loon-Plage |
| 2023–24 | Hyères-Toulon | Caen Calvados |
| 2024–25 | Challans | Quimper |
| 2025–26 | Metropolitans 92 | |