Every change in literature and specially in poem is depended on the change in humans mind and thought. And it’s criterias change according to the changes of philosophic thoughts. researchers believe that post-modernism caused the most important change in humans thought during the history and at current era, since all of famous philosophers who came after Plato, claimed that they were searching the truth and they want to know about it. But post-modern researchers believe that the truth is not achievable nor desirable. They think single permanent truth is meaningless. This idea has created essential changes in liberal arts domain. By entering this idea into literature and it’s branches, a new environment dominated on the world literature. These changes entered to Persian literature from 60s. and edged from stories from novels to poem. One of the poets who began to rhyme with this style is Ali Babachahi. We Can know him as a pioneer agent of post-modern poem in Iran. This study wants to analyze the signs of post-modern style in Babachahi’s poem, and to show that how this poet rhymed his poems in a post-modern environment. We emphasize on post-modern factors in Babachahi’s poem as a style. Although it seems that post-modern escapes from details and individuality, but it has central signifiers. So it has to form according to these signifiers. Hence we can call these factors not only individual style characteristics but also post-modern era characteristics.