The three dimensional vibration of the rotor in the HTSC-permanent magnet f
lywheel system is studied. The magnetic levitation using pining force of th
e HTSC bulk material has an advantage to achieve stable levitation without
control. However the transient characteristics of the levitation is not cle
arly understood. We have developed the flywheel system which can revolve up
to 12,000rpm, and the three dimensional vibration of the rotor are measure
d with laser displacement sensors. The vibration of the rotor around the me
chanical resonance frequency is investigated. The rotor shows both columnar
and conical behavior in the mechanical resonant state.