************************************************************************* 51208 We propose observations of Pisces-Perseus supercluster at the middle regions of Perseus cluster (z=0.0183) and AWM7 (z=0.0179), with 3 pointings of each 30 ks. Our prompt objective is to detect the X-ray emission from the supercluster of galaxies for the first time. Both Perseus and AWM7 are bright in X-ray and have elongated shapes along the supercluster axis, so that the Xray detection is quite probable. If the temperature and/or abundance are measured, it will give an important implications about the formation of the large scale structure of the Universe, etc. *************************************************************************