A spokesman for the northern town of Limone sul, Garda, says the stuntman suffered serious head injuries when he and another stuntman crashed during a car chase sequence on a winding lakeside road.
The spokesman says the stuntman underwent surgery at a hospital in nearby Verona. He said the second stuntman was slightly injured.
It is the second accident on the Italian set of "Quantum of Solace."
An Aston Martin went off the road Saturday and plunged into the lake. Producers said the driver suffered minor injuries.