This report presents the outline of the rocket structural testing facility constructed in Sagamihara campus of ISAS in 1984. The facility is composed of a) a 12m long, 8m tall, 6m wide testing stand, b) a 2-channel 70 MPa hydropressure loading device with a control unit, c) a 600-channel strain/displacement measureling system, and d) a data acquisition, processing and display system. Although the planning of the facility was motivated by the structural testings required in the process of development of Mu-3SII launch vehicle, it was designed so as to carry out the various structural testing of various kinds of structures as flexibly and efficiently as possible.