蝎子（学名：Scorpiones）是一种有8只脚的节肢动物，属于蛛形纲。

广泛的分布于世界各地，种类超过1000种。主要分布于热带和温带，除了南北极和其他寒带地区，其他地区具有分布。

Scorpions are predatory arachnids of the order Scorpiones. They have eight legs and are easily recognised by the pair of grasping pedipalps and the narrow, segmented tail, often carried in a characteristic forward curve over the back, ending with a venomous stinger. Scorpions range in size from 9 mm / 0.3 in. (Typhlochactas mitchelli) to 23 cm / 9 in. (Heterometrus swammerdami).