Marianne Schroeder (born 1949) is a Swiss pianist and composer. She studied with Giacinto Scelsi. She played at Carnegie Hall, Lucerne Festival and Théâtre des Champs-Élysées. She worked with John Cage and Shigeru Kan-no. She is a member of the Groupe Lacroix and as such is specialized in contemporary classical music. As a member of the Groupe Lacroix she has worked with international musicians, such as the Ensemble Sortisatio.