2004–05 Segunda Divisão B

The 2004–05 Segunda Divisão season was the 71st season of the competition and the 55th season of recognised third-tier football in Portugal.

Overview
The league was contested by 59 teams in 3 divisions with SC Covilhã, FC Vizela and FC Barreirense winning the respective divisional competitions and gaining promotion to the Liga de Honra. The overall championship was won by FC Vizela.

Segunda Divisão – Zona Centro
CD Alcains Withdrew