Günter Altner (1936–2011) was a German interdisciplanarily active scientist, biologist, Protestant theologian, ecologist, environmentalist, writer and lecturer.
Altner had briefly been a professor of human biology at the University of Education Schwäbisch Gmünd, subsequently focussed on theology, his second area of education, and was a professor of protestant theology at the University of Koblenz and Landau for 22 years.
Altner is known for his teaching and lectures, his numerous books, his role of co-founder and curator of the Öko-Institut and his activity as political advisor to the German government.
With his expertise in ecology and in the theological reflection on environmental ethics he held a unique position in the German-language theological and political discourse.