电动机（英文：Electric motor），又称为马达、摩打或电动马达，是一种将电能转化成机械能，并可再使用机械能产生动能，用来驱动其他装置的电气设备。大部分的电动马达通过磁场和绕组电流，在电机内产生能量。

电动机与发电机原理基本一样，其分别在于能量转化的方向不同：发电机是借由负载（如水力、风力）将机械能、动能转为电能；若没有负载，发电机不会有电流流出。电动机和电力电子、微控器配合已形成一新学门，称为电动机控制。

An electric motor is an electrical machine that converts electrical energy into mechanical energy. The reverse of this would be the conversion of mechanical energy into electrical energy and is done by an electric generator.

In normal motoring mode, most electric motors operate through the interaction between an electric motor's magnetic field and winding currents to generate force within the motor. In certain applications, such as in the transportation industry with traction motors, electric motors can operate in both motoring and generating or braking modes to also produce electrical energy from mechanical energy.