A Persian Treatise on Astrolabe Ascribed to  Abdal-Rahmānal-Sūfī

‘Abdal-Rahmānal-Sūfī is a well-known astronomer who has some works in astronomy, mathematics and alchemy. The importance of his Suwar al-Kawākib (book about the constellations) caused that researchers don’t practice his other works. Four treatises on astrolabe are ascribed to al-Sūfī, any one of them is in Persian. Attribution of the three Arabic treatises among these four to him is certain. In this article, besides providing a critical edition of the Persian text, its contents are compared with the Arabic versions.