Emanuel Friedrich Ludwig Fischer (31 January 1828, Bern – 21 May 1907, Bern) was a Swiss botanist. He conducted research on both phanerogams and cryptogams, native to the canton of Bern. He was the father of mycologist Eduard Fischer. He initially trained as a pharmacist, and later studied botany at the universities of Jena, Berlin and Zürich. In 1860 he became an associate professor and director of the botanical gardens at Bern. From 1863 to 1897 he was a full professor of botany at the University of Bern.