  We report on mapping observations toward the region of the most luminous
X-ray cluster RXJ1347-1145 (z=0.45) through the Sunyaev-Zel'dovich effect at
21GHz and 150GHz with the Nobeyama 45-m telescope. While a low angular
resolution image at 21GHz (beam-size of 76'') shows a consistent feature with
the ROSAT/HRI X-ray image, a higher angular resolution image (13'') at 150GHz
reveals complex morphological structures of the cluster region, which cannot be
simply described by the spherical isothermal beta-model. If such inhomogeneous
morphological features prove to be generic for high redshift clusters, distance
measurements to the clusters based on their Sunyaev-Zel'dovich data with low
angular resolution imaging should be interpreted with caution.
