The Ministry of Information announced the amnesty on its website, saying the prisoners were being freed "on humanitarian grounds."
It did not refer specifically to political prisoners. Most of those released had committed minor crimes.
The official Political Prisoner Scrutiny Committee said that at least 13 of those pardoned were jailed on political offences and at least eight were former senior military intelligence officers detained after the 2004 ouster of former intelligence chief and Prime Minister Khin Nyunt.
He praised the release, but called for the freedom of about 75 political prisoners who remain detained.
President Thein Sein, a former general who was elected in 2011 after five decades of military rule, had pledged to free all political offenders by the end of the year.
He has freed more than 1,000 political prisoners since taking office but critics note that people continue to be locked up for political offences under his nominally civilian government.
