The move marks the growing ties between French President Jacques Chirac and the German chancellor.
Allied forces disembarked on the Normandy coast in the first step towards liberating France from German occupation during World War II.
Mr Schroeder has said he will participate in the ceremonies.
The move shows how close a relationship has developed between the two countries since they put aside their wartime enmity.
Just 10 years ago it was deemed too soon to invite a German chancellor to the 50th anniversary, with the late French President, Francois Mitterrand, taking his German counterpart, Helmut Kohl, to a Franco-German youth festival instead.
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http://news.bbc.co.uk/2/hi/europe/3361763.stm