Oskar Lafontaine (b. 1943) is a German politician who served in the government of Germany as Minister of Finance from 1998 to 1999. Previously he was Minister-President of the state of Saarland from 1985 to 1998, and he was also Chairman of the Social Democratic Party from 1995 to 1999.
Beginning in 2007, Lafontaine was co-chairman of The Left. After being diagnosed with prostate cancer in 2009, he announced his resignation from federal political functions in January 2010, citing health reasons