The Nationale 1 Masculin (abbreviated as NM1; in English: National 1 Men) is the highest professional basketball league in Senegal.

Each season is finished with a final in a single-game elimination format, held at the Marius Ndiaye Stadium in Dakar.

AS Douanes is the most successful team in NM1 history with 11 won titles.

The bottom two teams are relegated to the second division Nationale 2.

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