The solution for the degenerate Kirchhoff equation in ultradifferential class was discussed. The proof of the problem was given in a ultradifferential class which is not included in a real-analytical solution. The solution for the Cauchy problem was obtained for the degenerate quasilinear hyberbolic equation of Kirchhoff type. The existence of a solution, with a degenerate and non-Lipschitz continuous function in a global real-analytical class, was established.