Euro 2012: Nicklas Bendtner banned for underpants celebration
He lowered his shorts to reveal the logo of a betting company on his underpants after scoring the second of his two goals in the 3-2 defeat.
“This suspension applies to the next 2014 Fifa World Cup match for which Bendtner is eligible,” said Uefa.
Bendtner has three days in which to appeal.
Denmark play the Czech Republic in their first World Cup qualfying game in September.
After the Portugal game on 13 June, the Arsenal striker said: “It is just a pair of lucky boxer shorts that I used in the first game as well and have used before the tournament.
“I didn’t know I was breaking any rules but I am aware of that now.”