Daniel Alain Marie Bacquelaine (French pronunciation: [danjɛl alɛ̃ maʁi baklɛn]; born 30 October 1952 in Liège, Belgium) is a Belgian Walloon politician.

After studying medicine at the University of Liège, Dr. Bacquelaine moved to Chaudfontaine as a general practitioner.

By reactivating the Felu (Liberal Students Federation of Liège), he led the protests against reform plans of the two Ministers of National Education of the time, the French-speaking Antoine Humblet [fr] and Flemish Herman De Croo.

He entered the Chamber of Representatives on July 20, 1994 succeeding Jean Gol, who moved to the European Parliament.

He quit as parliamentary group leader to become Federal Minister for Pensions, when the Michel Government was formed on 11 October 2014.