Abstract We present the Chandra and Suzaku observations of 1RXS J170047.8−314442, located towards the Galactic bulge, to reveal a wide-band (0.3–10 keV) X-ray morphology and spectrum of this source. With the Chandra observation, no point source was found at the position of 1RXS J170047.8−314442. Instead, we revealed the presence of diffuse X-ray emission, via the wide-band X-ray image obtained from the Suzaku XIS. Although the X-ray emission had a nearly circular shape with a spatial extent of ∼3${^{\prime}_{.}}$5, the surface brightness profile was not axisymmetric; a bright spot-like emission was found at ∼ 1΄ away in the northwestern direction from the center. The radial profile of the surface brightness, except for this spot-like emission, was reproduced with a single β-model; β and the core radius were found to be 1.02 and 1${^{\prime}_{.}}$51, respectively. The X-ray spectrum of the diffuse emission showed an emission line at ∼6 keV, indicating an origin of a thermal plasma. The spectrum was well explained with an absorbed, optically-thin thermal plasma model with a temperature of 6.2 keV and a redshift parameter of z = 0.14 ± 0.01. Hence, the X-ray emission was considered to arise from the hot gas associated with a cluster of galaxies. Our spectroscopic result confirmed the optical identification of 1RXS J170047.8−314442 by Kocevski et al. (2007, ApJ, 662, 224): CIZA J1700.8−3144, a member of the cluster catalogue in the Zone of Avoidance. The estimated bolometric X-ray luminosity of 5.9 × 1044 erg s−1 was among the lowest with this temperature, suggesting that this cluster is far from relaxed.