  The two dominant processes of lepton flavor violation, mu to 3e and mu to e
conversion in atomic nuclei caused by neutral KK gauge boson exchanges at tree
level, are studied in the context of five dimensional gauge-Higgs unification
scenario. The key point of the flavor violation is a fact that the bulk masses
and the brane ones cannot be simultaneously diagonalized. We estimate the
branching ratio of each processes and obtain the lower bound of
compactification scale around weak scale from the current experimental data. We
discuss the reasons why the final result is not so severe although the large
mixing in the lepton sector seems to give large lepton flavor violation
processes.
