履带（英语：Continuous tracks，意思是「连续轨道」）是一种使用于战车、工程车、M1A2等运输工具的设备，用来使这些机器移动。履带的构造有两大类别，一类时是以坚硬的材料制成，并由许多小片段组合而成；而另一类则一体成形，以类似橡胶的柔软材质制作。前者可用于重型车辆，但重量及行驶时的噪音较大，后者重量噪音俱小，但只能用于轻型车辆。

履带可以将车辆的重量平均分散在地面，防止车辆沉入地面，履带表面可完整贴于地面。相较于四轮车辆，装上履带带动后，可增加百分之八十八的抓地力，因此可在较恶劣地表行驶。

Continuous track, also called tank tread or caterpillar track, is a system of vehicle propulsion in which a continuous band of treads or track plates is driven by two or more wheels. This band is typically made of modular steel plates in the case of military vehicles and heavy equipment, or synthetic rubber reinforced with steel wires in the case of lighter agricultural or construction vehicles.