  The possibility of detecting Ultra-high energy (UHE from now on) neutrinos
due to superheavy dark matter are considered by the neutrinos interaction with
the nuclei in the air in the present paper. To reject other standard model
particles, UHE neutrinos, from superheavy dark matter and astrophysical
sources, skimming the Earth are detected at JEM-EUSO. Then the numbers of UHE
neutrinos detected by JEM-EUSO are evaluated at different energies (1 EeV < E <
1 ZeV) in 5 years. If the energy thresholds are taken to be 100 EeV, the
astrophysical neutrino contamination could be negligible in this detection. It
is possible that UHE neutrinos from the decay of superheavy dark matter are
detected at JEM-EUSO when $O(10^{27})s < \tau_{\phi}< O(10^{31})s$. For
example, O($10^4$) UHE neutrino events could be detected by JEM-EUSO at 30 EeV
in 5 years when $\tau_{\phi}=O(10^{27})$s. If so, it may be confirmed that
there may exist superheavy dark matter in the Universe.
