The Taça AF Viseu, generally known as the Taça Sócios de Mérito, is a men's football knockout cup competition held between the clubs of the Viseu Football Association and competed by semi-professional teams.

Winners receive the Taça AF Viseu trophy, qualify for the Taça de Portugal and a place in the Supertaça AF Viseu.

The cup is open to all clubs competing in the Viseu Football Association leagues.

The competition is a knockout tournament with pairings drawn at random.

As of 2011, the third tier of the Viseu Football Association, Segunda Divisão was abolished after the restructure of the Portuguese football league system, drastically reducing the number of teams.