There are very small number of Ottoman texts known to us on literary terms and arts in the Ottoman Turkish literature. Recent studies in various manuscript libraries have occasionally uncovered a few texts of this kind. In this study, we deal with a little known treatise on literary terms called the Risâletün mine'l-'Arûz ve Istılâhı'ş-Şİ'r by Alî b. Hüseyin Hüsâmeddîn Amasî. Having tried to identify Alî b. Hüseyin Hüsâmeddîn Amasî through primary sources, we discussed the content and language of the treatise. Since Amasfs treatise has a number of similarities with those written by fifteenth century writer Ahmed Bardahî and sixteenth century writer Sürün, a brief comparison of these three texts is made.