Propellant flow in a vacuum chamber, a test facility for electric propulsion systems, influences electric propulsion system performance evaluation. Reflection phenomena on the vacuum chamber wall have a strong influence on the propellant flow, however, it has been difficult to evaluate the phenomena on the actual vacuum device wall because the size of the measuring device for the phenomena is larger than the typical vacuum chamber size. In this study, the wall reflection phenomenon can be measured and evaluated in a 1m3 class vacuum chamber by downsizing the measuring device using a rarefied flow measuring device, which had developed in our previous works.