  We observed a nearby radio galaxy, the Centaurus A (Cen A), three times with
Suzaku in 2009, and measured the wide-band X-ray spectral variability more
accurately than the previous measurements. The Cen A was in the active phase in
2009, and the flux became higher by a factor of 1.5--2.0 and the spectrum
became harder than that in 2005. The Fe-K line intensity increased by 20--30%
from 2005 to 2009. The correlation of the count rate between the XIS 3--8 keV
and PIN 15--40 keV band showed a complex behavior with a deviation from a
linear relation. The wide-band X-ray continuum in 2--200 keV can be fitted with
an absorbed powerlaw model plus a reflection component, or a powerlaw with a
partial covering Compton-thick absorption. The difference spectra between high
and low flux periods in each observation were reproduced by a powerlaw with a
partial covering Compton-thick absorption. Such a Compton-thick partial
covering absorber was for the first time observed for the Cen A. The powerlaw
photon index of the difference spectra in 2009 is almost the same as that of
the time-averaged spectra in 2005, but steeper by $\sim0.2$ than that of the
time-averaged spectra in 2009. This suggests an additional hard powerlaw
component with a photon index of $<1.6$ in 2009. This hard component could be a
lower part of the inverse-Compton-scattered component from the jet, whose
gamma-ray emission has recently been detected with the Fermi/LAT.
