The Hollywood actor-turned-governor signed a law five weeks ago that made possession of up to an ounce of marijuana the equivalent of a traffic ticket. It carries a penalty of no more than a $100 fine and no arrest or criminal record.
He defended the law Monday, telling Jay Leno on NBC's "Tonight Show" it is a good idea.
According to a transcript of the interview, Schwarzenegger says: "No one cares if you smoke a joint or not."
On Election Day, voters rejected an initiative that would have allowed adults age 21 and older to possess and grow small amounts of marijuana.
The governor, who is wrapping up his final term, told Leno the ballot proposal went too far.