  The structure of the energy levels in a deep triple well is analyzed using
simple quantum mechanical considerations. The resultant spectra of the first
three energy levels are found to be composed of a ground state localized at the
central well and the two other states are distributed only among the left and
right well in anti-symmetric and symmetric way respectively. Due to the
tunneling effects the energy eigenvalue of the ground state is approximately
equal to the ground state energy for a harmonic oscillator localized at the
central well, while the two others are nearly degenerate with approximate
values equal to the ground state energy of a harmonic oscillator localized at
the left or right well. The resulting pattern of the spectra are confirmed
numerically. The failure of the instantonic approach recently applied for
predicting the correct spectra is commented
