Ellen F. M. 't Hoen (born 1960) is an international medical activist. She is an expert in medicines policy and intellectual property law and has been a consultant to a number of countries and international organisations. In 2005 and 2006 she was listed as one of the 50 most influential people in intellectual property in the world by the journal Managing Intellectual Property. Until May 1, 2012, 't Hoen was the first executive director of the Medicines Patent Pool, co-founded by UNITAID.