The man is being treated at a local hospital, said police Officer Doug Morse.
The stabbing apparently followed a disturbance between the victim and his assailant near the Safeway grocery store at 19th and S streets, Morse said.
The relationship between the victim and suspect is not known.
No one is custody.
PHOTO: Workers clean up after a man was stabbed Friday afternoon at the Safeway grocery store at 19th and S streets in Sacramento. Mark Jobson/Special to The Sacramento Bee