Very effective cooling methods have been required for high-temperature gas turbines. Reduction of cooling air also contributes to the improvement of jet engine performance, because the cooling air is bled from compressor of jet engine. Therefore, from this point of view, Multiple inclined impingement cooling for turbine shroud cooling has been invented by IHI, JAXA and authors' group. This cooling structure realizes 50% reduction of cooling air compared with conventional one maintaining same cooling efficiency. However detailed internal cooling behavior has not been clarified. This study is one of the researches in collaboration with IET, JAXA and us. The main purpose is to clarify the cooling behavior by Particle Image Velocimetry (PIV) and heat transfer measurement on the impingement wall by IR camera. In this paper, we describe the results of PIV for 4 types of acrylic test pieces (impingement angle=90°, 45°, 35°, 25°). The characteristics of time-averaged velocity, turbulence intensity and pressure drop were considered.