驱动蛋白（英语：Kinesin）是一类蛋白质超级家族，属于分子马达的一种，其成员代表驱动蛋白-1（Kinesin-1）在1985年被发现。驱动蛋白是由单体组成的多聚体，其“头部”具有ATP酶活性，能通过水解ATP获得能量，改变构型，进行运动。它和动力蛋白一样，以微管构成的轨道进行滑行。与可以朝微管两极运动的动力蛋白有些不一样，一种驱动蛋白只能朝一个方向运动，如驱动蛋白-1可以沿着微管的+运动，而另一些驱动蛋白则沿着-极运动，在细胞内起运输作用，比如牵拉染色体，参与有丝分裂、减数分裂和细胞迁移过程。

A kinesin is a protein belonging to a class of motor proteins found in eukaryotic cells.

Kinesins move along microtubule (MT) filaments, and are powered by the hydrolysis of adenosine triphosphate (ATP) (thus kinesins are ATPases). The active movement of kinesins supports several cellular functions including mitosis, meiosis and transport of cellular cargo, such as in axonal transport. Most kinesins walk towards the positive end of a microtubule, which, in most cells, entails transporting cargo such as protein and membrane components from the centre of the cell towards the periphery. This form of transport is known as anterograde transport. In contrast, dyneins are motor proteins that move toward the microtubules' negative end.