Montbau is a Barcelona Metro line 3 station located underneath Passeig de la Vall d'Hebron, between Carrer de l'Arquitectura and Carrer Pare Mariana. It was opened in 1985 and was the terminus of the line until the extension to Canyelles in 2001.

The side-platform station has a single ticket hall with two entrances; as the station is on a mountainside, one of the entrances is actually below the ticket hall level, requiring passengers to climb stairs up, but in August 2009 a new entrance has been open with no stairs to climb. It's a direct entrance to the hall from the seaside.

Lines serving the station
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Metro Barcelona Metro
Zona Universitària Vall d'Hebron L3 Mundet Trinitat Nova

L3 Barcelona Metro Line 3
Sant Feliu Centre · Sant Feliu | Consell Comarcal · Torreblanca · Sant Joan Despí · La Fontsanta · Hospital Comarcal · Sant Just Centre · Esplugues Centre · Sant Mateu · Finestrelles | Sant Joan de Déu · Zona Universitària · Palau Reial · Maria Cristina · Les Corts · Plaça del Centre · Sants Estació · Tarragona · Espanya · Poble Sec · Paraŀlel · Drassanes · Liceu · Catalunya · Passeig de Gràcia · Diagonal · Fontana · Lesseps · Vallcarca · Penitents · Vall d'Hebron · Montbau · Mundet · Valldaura · Canyelles · Roquetes · Trinitat Nova · Trinitat Vella