Public prosecutors asked for work to halt pending investigations seeking to guarantee workers' safety after the death of Marcleudo de Melo Ferreira, the fifth construction worker to die in stadiums being built to host the 2014 World Cup of football in 12 cities.
"As of noon today the work is banned," prosecutor Jorsinei Dourado do Nascimento told Globo News. "The notice has already been delivered."
It was not clear if the order applied to the entire stadium or just the roof.
The regional labor court did not answer phone calls requesting confirmation.
Andrade Gutierrez, the Brazilian firm building the Amazon stadium, could request an injunction to allow work to continue. The company was not immediately available for comment.
Manaus is scheduled to host four World Cup games in June, including high-profile encounters involving teams from England, Italy, the United States and Portugal. The stadium is supposed to be ready by Jan. 15.
Preparations for the competition - the first to be held in South America since 1978 - have been plagued by delays, accidents, cost overruns, and public anger over government waste that contributed to massive nationwide street protests last year.