波斯体字体或波斯悬体（波斯语：نستعلیق‎、拉丁转写：nastaʿlīq、音译纳斯赫·泰阿利格或纳斯塔里格、意思是“悬体”）是书写波斯—阿拉伯文本的一种字体，归属“竹笔体”，是伊斯兰书法当中“六大字体”之一。普遍用于两河阿拉伯人聚居地区以东的“东部地区”（الشرق‎‎）。该地包括伊朗以及南亚的多个重要语言，其中波斯体用于书写波斯语、乌尔都语、喀什米尔语、旁遮普语、普什图语等语言的使用现象尤为广泛。同时波斯体可以用于书写阿拉伯语、奥斯曼土耳其语等西亚语言，但在西亚地区称作泰阿利格或塔里格（阿拉伯语：تعلیق‎）。西亚、北非地区的阿拉伯语、索马里语、豪萨语等语言普遍使用成形更早的誊抄体（نسخ‎‎、拉丁转写：nasḫ、音译“纳斯赫”）。在当今使用波斯—阿拉伯字母系统的地区内，波斯体已经成为誊抄体以后的第二大字体。顾名思义，波斯体源于古波斯（今伊朗），字体约成形于14至15世纪。萨非王朝著名的书法家米尔·阿里·大不里士（或译米尔·阿里·泰卜里齐）便是波斯体的一位早期代表。

Nastaʿlīq (also anglicized as Nastaleeq; in Persian: نستعلیق nastaʿlīq) (includes of words: "Naskh (نسخ)" and "ta'liq (تعلیق)") is one of the main calligraphic hands used in writing the Persian script, and traditionally the predominant style in Persian calligraphy. It was developed in Iran in the 14th and 15th centuries. It is sometimes used to write Arabic-language text (where it is known as Taʿliq or Persian and is mainly used for titles and headings), but its use has always been more popular in the Persian, Turkic and Urdu sphere of influence. Nastaʿlīq has extensively been (and still is) practiced in Iran, Pakistan, India, Afghanistan and other countries for written poetry and as a form of art.