  A simple form of neutrino mass matrix which has only two free parameters is
proposed from a phenomenological point of view. Using this mass matrix, we
succeed to reproduce all the observed values for the MNS lepton mixing angles
and the neutrino mass squared difference ratio. Our model also predicts
$\delta_{\nu}= 155^\circ$ for the Dirac CP violating phase in the lepton sector
and the effective neutrino mass $\langle m \rangle=6.3\times 10^{-3}$ eV in the
neutrinoless double beta decay.
