  We present here the results of the X-ray analysis of Galactic supernova
remnant G346.6-0.2 observed with {\it Suzaku}. K-shell emission lines of Mg,
Si, S, Ca and Fe are detected clearly for the first time. Strong emission lines
of Si and S imply that X-ray emission nature of G346.6-0.2 is ejecta-dominated.
The ejecta-dominated emission is well fitted with a combined model consisting
of thermal plasma in non-equilibrium ionization and a non-thermal component,
which can be regarded as synchrotron emission with a photon index of $\Gamma$
$\sim 0.6$. Absorbing column density of $N_{\rm H}\sim2.1\times10^{22}$ ${\rm
cm^{-2}}$ is obtained from the best-fitting implying a high-density medium,
high electron temperature of $kT_{\rm e}\sim1.2$ keV, and ionization timescale
of $n_{\rm e}t\sim2.9\times10^{11}$ ${\rm cm^{-3}s}$ indicating that this
remnant may be far from full ionization equilibrium. The relative abundances
from the ejecta show that the remnant originates from a Type Ia supernova
explosion.
