囊蠕虫(Aschelminthes，又作Aeschelminthes)是过去分类学上的一个门，内含多种假体腔动物及其他类似的动物，包括线虫动物、轮形动物、腹毛动物、动吻动物、线形虫动物，有时还包括了鳃曳动物及内肛动物。这些动物分类大部分已不再被认为是有密切相关的，而被独立成门。此词现在只是一个非正式的用语。

The Aschelminthes (also known as Aeschelminthes "Nemathelminthes" "Nematodes"), closely associated with the Platyhelminthes, are an obsolete phylum of pseudocoelomate and other similar animals that are no longer considered closely related and have been promoted to phyla in their own right. The term Aschelminth is now generally only used as an informal name for any member of the approximately ten different invertebrate phyla formerly included within Aschelminthes.