  A fair gambling is hard to be made between two spatially separated parties
without introducing a trusted third party. Here we propose a novel gambling
protocol, which enables fair gambling between two distant parties without the
help of a third party. By incorporating the key concepts and methods of game
theory, our protocol will force the two parties to move their strategies to a
Nash-equilibrium point which guarantees the fairness through the physical laws
of quantum mechanics. Furthermore, we show that our protocol can be easily
adapted to a biased version, which would find applications in lottery, casino,
etc. A proof-of-principle optical demonstration of this protocol is reported as
well.
