Abstract: The microsporogenesis，megasporogenesis，and development of the male and female gametophytes of pistachio were observed by paraffin section technique to test whether there is any obstacle of reproduction in the process of sexual reproduction. The results showed：（1）The wall of anther consists of epidermis，endothecium，middle layers and tapetum from out to inside，tapetum cell is of glandular tapetum.（2）Cytokinesis during meiosis of the microspore mother cell was simultaneous type，and tetrads were isobilateral.（3）Mature pollen grain was 2-cell type with three germ pores.（4）There is an ovary that contains one ovule，ovules occur at the base of ovary. The ovule was anatropous，bitegmic and crassinucellate. The development of embryo sacs belonged to polygonum type.（5）Some of female gametophyte was abnormal.

Key words: Pistacia vera, megasporogenesis, microsporogenesis, male gametophyte, female gametophyte