Marianne Kleiner (née Schläpfer; born 29 May 1947) is a Swiss politician who served as a Member of the National Council from 2003 to 2011 and was President of the Radical Democratic Party from 2004 to 2005.

[2] In 1966, she married Peter Kleiner, the sole editor of the Appenzeller Tagblatt, then director of the Zollikofer printing house.

[2] After her family moved to Hérisau, she attended primary and secondary school there, and obtained a maturity of the commercial type in St.

[2] From 1979 to 1994, she teacher at the management center of the School of Economics and Social Sciences of the University of St. Gallen and led projects there.

[2] From 2011 to 2023, she chaired the cantonal section of Winterhilfe Schweiz,[2] notably ensuring the external representation of the foundation.