The England international flapped at a corner which gifted Atalanta their equaliser before he was beaten from the spot in his first outing for the Italian club since arriving on loan from Manchester City.
Hart has been criticised for his display but Arsenal legend Seaman believes he possesses the quality to recover from the disappointment.
"Joe is a quality goalkeeper," Seamantold Sky Sports News HQ.
"He didn't become a bad goalkeeper overnight or by making a couple of mistakes.
"I know he made a bit of a mistake on his debut, but that's what happens with us, you make mistakes and it's how you recover.
"He's a quality goalkeeper and he will bounce back. I'm sure Torino will be very happy with him."