Besides being fined the equivalent of $14,300 for each day in violation, Google was ordered to pay euro300,000 ($430,000) in damages and interest to French publisher La Martiniere, which brought the case on behalf of a group of French publishers.
Google attorney Alexandra Neri said the company would appeal.
The decision erects another legal barrier that may prevent Google from realizing its 5-year-old goal of scanning all the world's books into a digital library accessible to anyone with an Internet connection.
A U.S. legal settlement that would give Google the digital rights to millions of books is in limbo because U.S. regulators have warned a federal judge in New York that the arrangement probably would thwart competition in the budding electronic book market and compromise copyrights, as well.
The top U.S. copyright official and the governments in Germany and France also have raised objections about that settlement overstepping its bounds. Google is trying to address the critics with a revised settlement that is still under court review.
The French case is relatively small in comparison. It didn't even seem to faze investors as Google shares gained $3.86 to $597.80 in Friday afternoon trading.
Still, the ruling served as a reminder that Google's ambitious push into other markets beyond Internet search increasingly is clashing with fears the Mountain View, Calif., company is getting too powerful.
As part of the backlash, Google has been depicted as a copyright scofflaw that prospers off the content of others
- a portrayal the company's management insists is totally off base.
The head of the French publisher's union applauded Friday's verdict.
"It shows Google that they are not the kings of the world and they can't do whatever they want," said Serge Eyrolles, president of France's Syndicat National de l'Edition. He said Google had scanned 100,000 French books into its database, 80 percent of which were under copyright.
Eyrolles said French publishers would still like to work with Google to digitize their books, "but only if they stop playing around with us and start respecting intellectual property rights."
Philippe Colombet, the head of Google's book-scanning project in France,
said the company disagrees with the court's ruling.