Winfried Nachtwei (born 15 April 1946 in Wulfen) is a German politician and former member of Alliance '90/The Greens in the Bundestag.

Nachtwei was a member of the Communist League of West Germany (Kommunistischer Bund Westdeutschland; KBW) in the 1970s.

Nachtwei first became a member of the German Bundestag in the 1994 elections, representing the electoral district of Münster.

In addition to his committee assignments, Nachtwei served as member of the Parliamentary Friendship Group for Relations with the SADC States; the Parliamentary Friendship Group for Relations with the Baltic States; and the German-Belarusian Parliamentary Friendship Group.

This biography article about a member of the German Alliance 90/The Greens Party is a stub.