Faisal Hayyat, a journalist and a blogger who hosts a satirical channel on YouTube, was convicted Tuesday of insulting a "religious symbol and group," the watchdog said.
He has been in detention since October 9, the last time he tweeted saying that he had been summoned by police for investigation.
Indian journalist arrested over social media post
The Sunni-ruled Gulf kingdom has been shaken by unrest since security forces crushed protests led by crowds of its Shia majority demanding a constitutional monarchy and an elected prime minister in 2011.
Scores of Shias have been jailed on charges of involvement in the unrest and others have been stripped of their citizenship.
The crackdown has drawn criticism from the United Nations and the United States.
COMMENTS
Comments are moderated and generally will be posted if they are on-topic and not abusive.
For more information, please see our Comments FAQ