大西洋刀蛏（学名：Ensis directus）为刀蛏科刀蛏属下的一个种。

The Atlantic jackknife clam, Ensis directus, also known as the bamboo clam, American jackknife clam or razor clam (but note that "razor clam" sometimes refers to different species), is a large species of edible marine bivalve mollusc, found on the North American Atlantic coast, from Canada to South Carolina. It has also been introduced to Europe.