  The abundances of O, Mg, Si and Fe in the intracluster medium of the
Centaurus cluster are derived. The Fe abundance has a negative radial gradient.
In solar units, the Si abundance is close to the Fe abundance, while the O and
Mg abundances are much smaller. The high Fe/O and Si/O ratio indicate that
metal supply from supernovae Ia is important and supernovae Ia synthesize Si as
well as Fe. Within 2$'$, the O and Mg abundances are consistent with the
stellar metallicity of the cD galaxy derived from the Mg$_2$ index. This result
indicates that the central gas is dominated by the gas from the cD galaxy. The
observed abundance pattern of the Centaurus cluster resembles to those observed
in center of other clusters and groups of galaxies. However, the central Fe
abundance and the Si/Fe ratio are 40 % higher and 30% smaller than those of M
87, respectively. Since the accumulation timescale of the supernovae Ia is
higher in the Centaurus cluster, these differences imply a time dependence of
nucleosynthesis by supernovae Ia.
