  A theory of the tunneling spectroscopy of normal metal / Larkin-Ovchinnikov
(LO) state is presented by fully taking account of the periodic modulation of
pair potentials in real space. The resulting tunneling spectra have
characteristic line shapes with several maxima and minima reflecting minigap
structures due to the periodic pair potentials. These features are
qualitatively different from tunneling spectra of Fulde-Ferrell state and those
of uniform $s$- and d-wave superconductors.
  On the basis of calculated results, we propose a method to identify the LO
state in actual experiments.
