  We define a notion of quantum automorphism group of Graph C*-algebras for
finite, connected graphs. Under the assumption that the underlying graph does
not have any multiple edge or loop, the quantum automorphism group of
underlying directed graph in the sense of T. banica is shown to be a quantum
subgroup of quantum automorphism group in our sense. Quantum symmetries for
some concrete graph C*-algebras have been computed.

Operator Algebras