Mann sustained what his representative described as a superficial injury after a weapon accidentally discharged while holstered.
The 83-year-old filmmaker behind crime classics like "Heat," "Collateral" and "Thief" has apparently been an experienced target shooter for decades, and the accident happened at a sanctioned gun range.
Mann continues to be quite active in Hollywood in his 80s. He most recently directed the film "Ferrari," with Adam Driver, and is developing a sequel to "Heat," which is supposed to begin filming early next year.