| Marianne Merchez | |
| Type: | ESA astronaut |
| Status: | Retired |
| Nationality: | Belgian |
| Birth Date: | 1960 11, df=yes |
| Birth Place: | Uccle, Belgium |
| Occupation: | Medical Doctor |
| Selection: | 1992 ESA Group |
| Mission: | None |
Marianne Merchez (born 25 October 1960 in Uccle) is a Belgian doctor from the Catholic University of Louvain and a former European Space Agency astronaut.[1] She is certified in aerospace medicine and in industrial medicine, and she is also a professional pilot (holds a Belgian Air Transport Pilot License from Civil Aviation School, former co-pilot Boeing 737).
She is married to former Italian ESA astronaut Maurizio Cheli with whom she co-authored Tutto in un istante: le decisioni che tracciano il viaggio di una vita.[2]