魔法书（英语：Grimoire）指在中世纪后期到十八世纪期间，描述关于魔法的条列和实作的魔导书籍。内容有包含相关于占星学的知识、也有条列天使及恶魔的名单、使用符咒和咒语的方法，用以制做药物及护身符、召唤像是恶魔一类的超自然现象存在实体。任何有关于魔法的书（尤其是写关于咒语）也都可以被称为魔法书。

许多魔法书都重点阐述了卡巴拉、犹太教神秘哲学的魔法和占星术知识。也有许多人称，魔法书中很多内容都来自《圣经》中的所罗门国王的相关作品。一些著名的魔法书有《所罗门的钥匙》、《所罗门的小钥匙》、《阿巴太尔魔法》、《七日谈》、《洪诺流的魔法书》、《黑色小母鸡》、《万事通占卜家鲁道夫》、《神圣的魔法》等。

A grimoire (/ɡrɪmˈwɑːr/ grim-WAR) is a textbook of magic, typically including instructions on how to create magical objects like talismans and amulets; how to perform magical spells; charms and divination; and how to summon or invoke supernatural entities such as angels, spirits, and demons. In many cases, the books themselves are believed to be imbued with magical powers, though in many cultures, other sacred texts that are not grimoires (such as the Bible) have been believed to have supernatural properties intrinsically. In this manner while all books on magic could be thought of as grimoires, not all magical books should.