French officials have used the state of emergency imposed after the Paris attacks of 2015 to curb peaceful demonstrations, a rights group says, reports the BBC.
Amnesty International said hundreds of decrees were issued under the emergency laws, banning public assemblies or individuals from protests.
France's interior ministry has not yet responded to a BBC request for comment.
The state of emergency allows searches without a warrant and people to be placed under house arrest.
It is set to expire on 15 July but President Emmanuel Macron has said he will ask parliament to extend it for the sixth time until November.
The measure was introduced after the attacks of 13 November 2015, when militants from so-called Islamic State (IS) killed 130 people in gun and bomb attacks around the capital.
According to Amnesty's report, between November 2015 and 5 May 2017 there were 155 decrees issued under the emergency powers prohibiting public assemblies.
There were also 639 measures aimed at preventing individuals from taking part in public assemblies, the majority of them related to protests against proposed labour law reforms, it added.