The Frenchman, 58, celebrated 12 years in charge of the club at the weekend, a period which has been one of the most successful in their history.
He signed an extension to his contract a year ago but this week he suggested that he may not do so again after what will then be 15 years in the Gunners hot seat.
"I've not thought about my contract. I will give myself to the end of my contract in 2011 and then have a serious check-point," said Wenger. "You don't want to go on too long.
"I don't want to walk away at the moment, but in two or three years things can change in any job. To be honest I would have laughed if someone had said I'd be here for 12 years," added the Arsenal boss.
"But I said to my wife 'at 55 I stop, I promise you'. And at 55 I said 60. Now I just don't speak about it any more!"