Giggs will play his 600th game for United tomorrow at Tottenham.
Wenger sees the midfielder as an example to any footballer, no matter their age.
"He is a leading example of a player who is completely dedicated to their sport, who love it passionately, love to win and are rewarded through their club," Wenger told arsenal.com.
"I would like to say congratulations to Ryan Giggs. I have a huge respect for what he has done and the way he has played football. I am very happy for what he has done.
"He has played for Wales and was never at the World Cup, but at least he had access to success through his club. That tells you how important it is for any player to have access to big clubs."
Giggs has been troubled by a hamstring injury throughout his career but continues to defy the odds by competing at the top of his profession more than two decades after joining United.
"Today science is advanced enough to have an adapted programme to every player who has problems," said Wenger. "Giggs had some problems and got rid of it certainly through an adapted programme."