尼卡布（阿拉伯语：نقاب, niqāb‎，“面纱”或者“面具”）是用于覆盖面部的一种布制面纱，有时作为希贾布（盖头）的一部分。它是一些穆斯林妇女在公共场所和非马赫拉姆成年男性面前所穿的服装饰品。大部分蒙面面纱穿戴者主要在阿拉伯半岛国家，如沙特阿拉伯，也门，阿曼和阿联酋。另外在索马里、叙利亚、阿富汗、巴基斯坦、印度、孟加拉国以及巴勒斯坦统治的领土，伊朗南部省份与其他穆斯林人口分布领域的一些地区也有人穿戴尼卡布。由于古兰经指示穆斯林男子和妇女需要衣着端庄，并保护他们的隐私部位；所以各种各样的盖头在穆斯林世界被广泛佩戴，面纱的类型不太容易被区分从而经常被混淆。尼卡布作为面纱主要遮盖面部，而布卡则是罩袍，覆盖从头部到地面的全部身体。

A niqab (/nɪˈkɑːb/; Arabic:نِقاب‎ niqāb, "veil" also called a ruband) is a cloth that covers the face as a part of sartorial hijab. It is worn by some Muslim women in public areas and in front of non-mahram men, especially in the Hanbali Muslim faith tradition. The niqab is worn in the Arab countries of the Arabian Peninsula such as Saudi Arabia, Yemen, Oman, and the United Arab Emirates. The niqab is also worn in countries such as Somalia, Syria, Afghanistan, Pakistan, India, Bangladesh as well as some parts of Palestinian-ruled territories, southern provinces of Iran, and additional areas with sizeable Muslim populations. Because of the wide variety of hijab worn in the Muslim world, it can be difficult to definitively distinguish between one type of veil and another. The terms niqab and burqa are often incorrectly used interchangeably; a niqab covers the face while a burqa covers the whole body from the top of the head to the ground.