De Beauvoir - the lifelong companion of existentialist philosopher Jean Paul-Sartre - made a name for herself with the 1949 book The Second Sex.
The bridge stretches 304 m (1,000ft) across the Seine near the Francois Mitterrand national library.
It spans one of the widest points of the river without the support of pillars, comprising several lanes for pedestrians and cycles.
"And Simone de Beauvoir was very fitting because of the type of person she was - very modern and very much ahead of her time," he said.
Both de Beauvoir and Sartre were part of the left bank intellectual elite. She died in 1986, six years after him.
- The Simone de Beauvoir footbridge [Feichtinger Architectes]