Recently it has been speculated that a set of in nitesimal VirasoroL VirasoroR dif- feomorphisms exist which act nontrivially on the horizon of some black holes such as Kerr and Kerr{Newman black holes.1,2 Having applied this symmetry in covariant phase space formalism, one can obtain Virasoro charges as surface integrals on the horizon. Kerr{Bolt space{time is well known for its asymptotically topology and has been studied widely in recent years. In this work, we are interested to nd conserved charge associated to the Virasoro symmetry of Kerr{Bolt geometry using covariant phase space formalism. We will show right and left central charge are cR = cL = 12J, respectively. Our results also show good agreement with Kerr space{time in the limiting behavior.
