Conan O'Brien is shelling out his own cash to some ex-staffers who didn't get jack from that $7.5 million separation deal from NBC.

According to sources close to production, Conan's stagehands from "The Tonight Show" were not covered by the NBC severance plan. But we're told Conan is stepping up -- promising to pay his nearly 50 person crew at least six weeks severance out of his own pocket.

Conan's people had no comment.

The union for his former crew -- IATSE Local 33 -- says all the members who worked with Conan are "very happy" with the way he handled the whole mess.