'''Cacing tanah''' (bahasa Inggeris:''Earthworm'') ialah nama biasa untuk ahli terbesar [[Oligochaeta]] (iaitu sama ada kelas atau subkelas bergantung kepada pengarang) dalam filum [[Annelida]]. InDahulunya classicalia systemsdiletakkan they were placed in thedalam order '''Opisthopora''', on the basis of the male pores opening posterior to the female pores, even though the internal male segments are anterior to the female. Theoretical [[Cladistics|cladistic]] studies have placed them instead in the suborder '''Lumbricina''' of the order Haplotaxida, but this may again soon change. Folk names for the earthworm include "dew-worm", "Rainworm", "night crawler" and "angleworm" (due to its use as [[fishing bait]]).
