希贾布（阿拉伯语：حجاب‎），指穆斯林妇女穿着的头巾，也泛指穆斯林风格的服装。在阿拉伯语里，“希贾布”意为“窗帘”或者“遮盖物”。大部分伊斯兰法律将这种类型的服装定义为在公开场合遮盖除脸和手的其余身体部位。按照伊斯兰观点，希贾布带有谦逊、隐私、美德的含义。

穆斯林对于希贾布有不同要求。在一些国家如伊朗和沙特阿拉伯要求妇女在公共场合穿戴希贾布，而在土耳其，则在学校不必穿戴。另一些国家将这个问题交给妇女自行决定。法国2010年起禁止女性穿戴尼卡布（面纱）和波卡（罩袍），但并未对仅包裹头发的希贾布作出限制，穿戴尼卡布或波卡的妇女将会被处罚150欧元的罚款。如果家族中男性成员强制家人穿戴这类面纱，则有可能被罚款3万欧元或判处一年监禁。

A hijab or ḥijāb (/hɪˈdʒɑːb/, /hɪˈdʒæb/, /ˈhɪ.dʒæb/ or /hɛˈdʒɑːb/; Arabic:حجاب‎, pronounced [ħiˈdʒæːb] or [ħiˈɡæːb]) is a veil that covers the head and chest, which is particularly worn by some Muslim women beyond the age of puberty in the presence of adult males outside of their immediate family and non-muslims. It can further refer to any head, face, or body covering worn by Muslim women that conforms to a certain standard of modesty. Hijab can also be used to refer to the seclusion of women from men in the public sphere, or it may embody a metaphysical dimension – Al-hijab refers to "the veil which separates man or the world from God".