在伊斯兰教婚姻法学中，麦亥尔（阿拉伯语：مهر‎）是结婚的时候由新郎必须赠送给新娘的财物，此后新娘拥有这批财物的合法所有权。虽然麦亥尔通常都是钱币，但新娘亦可接纳珠宝、家具、住宅、土地等资产。麦亥尔是伊斯兰婚约的重要部分。

即使婚约上没有列明麦亥尔的具体金额，丈夫亦必须向妻子支付合理金额的麦亥尔。古兰经及圣训多次提到麦亥尔的相关要求。

麦亥尔通常是以分期付款的方式支付，在婚约签订之时交付的部分被称为穆阿贾勒（阿拉伯语：مقدم‎），延后支付的部分被称为穆瓦贾勒（阿拉伯语：مؤخر‎）。麦亥尔的性质、定义及运行条件随着不同地区和教法学派的伊斯兰教法学而不尽相同。

In Islam, a mahr (in Arabic:مهر‎; Persian:مهريه‎‎; Turkish:Mehir also transliterated mehr, meher, or mahriyeh) is a mandatory payment, in the form of money or possessions paid or promised to pay by the groom, or by groom's father, to the bride at the time of marriage, that legally becomes her property. While the mahr is often money, it can also be anything agreed upon by the bride such as jewelry, home goods, furniture, a dwelling or some land. Mahr is typically specified in the marriage contract signed during an Islamic marriage.