佛拉瓦奇（阿维斯陀语：fravaši）是琐罗亚斯德教的宗教用语。指的是由上帝所设计，类似于自然规律的一种精灵。它代表着上帝所设计的正确生活方式。

据祆教《创世纪》（Bundahishn）所述，上帝在最初的三千年里，创造了无数的“虚空”和“佛拉瓦奇”。虚空用来分割明暗，保护光明不为黑暗所污染。而佛拉瓦奇则是一种其他宗教都没有的精灵，祂存在于天堂。但会进入任何一种创造物中，促使该创造物按上帝预定的方向运动、发展和演化。如日月的升降、生物的成长，都与佛拉瓦奇有密不可分的关系。

Fravashi (fravaši, /frəˈvɑːʃi/) is the Avestan language term for the Zoroastrian concept of a personal spirit of an individual, whether dead, living, and yet-unborn. The fravashis of an individual sends out the urvan (often translated as 'soul') into the material world to fight the battle of good versus evil. On the morning of the fourth day after death, the urvan is imagined to return to its fravashi, where its experiences in the material world are collected to assist the next generation in their fight between good and evil.