蕈毒碱型乙酰胆碱受器是一大类固定在细胞膜上的乙酰胆碱受器，其对蕈毒碱比对烟碱（尼古丁）更为敏感。反过来对烟碱比较敏感的则称为烟碱型乙酰胆碱受器。蕈毒碱与烟碱两者皆为生物碱(alkaloid)。许多药品与其他类物质(例如pilocarpine与东莨菪碱)常以促进剂或拮抗剂的角色发生作用，并且其作用是仅单一针对蕈毒碱受器或单一针对烟碱受器，使得这样的受器分类显得有用。

Muscarinic acetylcholine receptors, or mAChRs, are acetylcholine receptors that form G protein-receptor complexes in the cell membranes of certain neurons and other cells. They play several roles, including acting as the main end-receptor stimulated by acetylcholine released from postganglionic fibers in the parasympathetic nervous system.