  We study whether the inflation is realized based on the radion gauge-Higgs
potential obtained from the one-loop calculation in the 5-dimensional gravity
coupled to a $U(1)$ gauge theory. We show that the gauge-Higgs can give rise to
inflation in accord with the astrophysical data and the radion plays a role in
fixing the values of physical parameters. We clarify the reason why the radion
dominated inflation and the hybrid inflation cannot occur in our framework.
