Sonchus arvensis, the field milk thistle, field sowthistle, perennial sow-thistle, corn sow thistle, dindle, gutweed, swine thistle, or tree sow thistle, is a species of plant in the genus Sonchus.

Sonchus arvensis is native to Europe, where it is widespread across most of the continent. It has also become naturalized in many other regions, and is considered an invasive noxious weed in some places.