Portugal calls for eu financial bail-out
Mr Socrates said the country was "at too much risk that it shouldn't be exposed to".
The government has long resisted asking for aid but last week admitted that it had missed its 2010 budget deficit target.
Portugal follows Greece and the Irish Republic in seeking a bail-out.
"I always said asking for foreign aid would be the final way to go but we have reached the moment," Mr Socrates said.
"Above all, it's in the national interest."
Source: BBC