In this paper the problem of Kirchhoff simplified model for beam is studied and analytical
solution is presented. Governing equation is solved analytically using a kind of analytic technique for
nonlinear problems namely the Homotopy Analysis Method (HAM), for the first time. Present solution
gives an expression which can be used in wide range of time for all domain of response and method is able
to control the convergence of the solution. Comparisons of the obtained solutions with numerical results
show that this method is effective and convenient for solving this problem. This method is a capable tool
for solving this kind of nonlinear problems.