Htin Kyaw told VOA that he was released Friday after being detained for about one day.
He launched a solo protest on Thursday, standing in front of a busy market in the capital of Rangoon, shouting slogans that called for religious freedom.
Htin Kyaw says he was unhappy that government officials had allegedly prevented him from serving as a monk at a local monastery.
However, after explaining his situation to authorities, Htin Kyaw told VOA that authorities agreed to let him become a monk.
Htin Kyaw has been arrested several times in the past month.
He was picked up in late February after taking part in a rare demonstration in Rangoon calling for more political freedom and better living conditions.
He was arrested at least two other times after holding a news conference that focused on similar issues. Burma has little tolerance for political dissent, and the military government currently holds at least 1,100political prisoners.