---

In the words of the poets, there are motifs that in addition to being frequent and extensive are linked to the knowledge and epistemology of the narrator. Among them, the "tree motif" in NaserKhosrow’s poetry and prose with a frequency of at least 177 times is one of the central themes and images which are rooted in the poet’s intellectual and religious beliefs. NaserKhosrowhas often used this motif in two major ways: First as an image of the universe in the form of a tree with human beings as its fruits, and second as an image of a human being in the form of a tree with his moral traits as the sweet and valuable fruits as well as his immoral traits as bitter and harmfulfruits.In the present study, in addition to investigating the background and origin of this theme, its different aspects have been analyzed. The results indicate the special and unique importance of tree in the poet’s mind and imagination and also the impact of Islamic teachings and Ismaili works and theories on the poet increatingsuch themes and images.