Campeonato Nacional de Seniores Masculinos, Segunda Divisão (in English, Men's Senior National Championship, 2nd Division), just Segunda Divisão, is the second-tier handball league in Portugal.

The best teams get promoted to Andebol 1, and the worst are relegated to the Portuguese Handball Third Division.

The second tier was established in 1966 as a result of the need for the expansion of national handball competitions due to the increase in the number of participating teams in regional championships.

In 2001, another rebranding of the top division led to the Segunda Divisão becoming once again the 3rd tier of Portuguese handball.

As the dispute ended, the Segunda Divisão became de facto the 3rd tier of Portuguese handball in 2007.