The purpose of this research is, in fact, to study Cedar's motif in Persian masterpieces, and to survey the relation between this motif and religious beliefs, traditions and Persian culture.Therefore, the Cedar's motif in the different art masterpieces from ancient era, intensity of its influence on Persian's beliefs or the influence of Persian's beliefs, religion and traditions on Cedar's motif and finally special thoughts related to this motif have been considered and investigated.Depicting Cedar's motif in different masterpieces can be a reason of its importance; this also can show special Persian's beliefs that had continued from ancient ages up to Islamic period. This motif has deep senses and because of that we can see it in different masterpieces in various situations.This article tries to recognize and introduce the symbolic and religious aspect of this magnificent motif as well as its sanctity. The method of this article is documental, and in conclusion we see that the cedar's motif is a symbol of liberty, liberalism, shadowing, youth, etc. and its effect on Persian masterpieces and beliefs and vice versa is undeniable.