Abstract
The Hayabusa spacecraft, which was launched in May 2003, arrived at Asteroid Ito-kawa in September 2005, and it made observations of Itokawa and tried touch down in about three months.Hayabusa has four scientific instruments, that is Multi-Spectral Telescopic Imager (AMICA), Laser Altimeter (LIDAR), Near-Infrared Spectrometer (NIRS), and X-ray Fluorescence Spectrometer (XRS). The data obtained by these instruments were firstly analyzed by Hayabusa Science Team and some of the results have been pub-lished as scientific papers. At the same time, the science team was preparing to open them to the public and this work has almost been done. Therefore the science team release the data archives to public from April 24, 2007. All the scientific data that Hayabusa obtained are open to the public.The Hayabusa data archives can be accessed from the following web site:(URL) http://hayabusa.sci.isas.jaxa.jp/