Abstract
Since 1990, Reduced‐gravity experiment flight has been carried out about 12,700 parabolic flights by Mitsubishi MU‐300 and Gulfstream‐Ⅱ airplane in Japan. And a total of 537 experimental subjects have been made by Reduced‐gravity flight in Japan. In addition, Diamond Air Service Inc. (DAS) which is conducted Reduced‐gravity flight has started new program named ``The simple weightless experiment'' campaigh since 2005. The purpose of this campaign is for the people other than scientist to be able to make easy experiment in weightlees environment and experience to take a space walk. This paper introduces the outline of airplane experiment for scientist and ``The simple weightless experiment'' campaign.
