大刀蛏（学名：Ensis siliqua）为刀蛏科刀蛏属下的一个种。

The pod razor, Ensis siliqua, is a coastal bivalve of European waters. It is edible and has been fished commercially, especially in Spain, Ireland and Scotland.

Ensis Siliqua is also known as razor fish, razor clam or giant razor.

There is at least one subspecies: E.s. minor.