Sefer Raziel HaMalakh, (Hebrew ספר רזיאל המלאך Book of Raziel the Angel), is a medieval Practical Kabbalah grimoire, primarily written in Hebrew and Aramaic, but surviving also in Latin translation, as Liber Razielis Archangeli, in a 13th-century manuscript produced under Alfonso X.
The book cannot be shown to predate the 13th century, but may in parts date back to Late Antiquity. Like other obscure ancient texts such as the Bahir and Sefer Yetzirah, the work has been extant in a number of versions. The tradition around the book attributes it to have been revealed to Adam by the angel Raziel. The title itself is mentioned in another magical work of late antiquity, The Sword of Moses. Critical historians regard it as a medieval work, most probably originating among the Chassidei Ashkenaz, as citations from it begin to appear only in the 13th century. Sections of it are no doubt older. The likely compiler of the medieval version is Eleazer of Worms, as "Sefer Galei Razia", which developed to what we have now as "Sefer Raziel HaMalakh", including more writings written by people of various theological opinions.
It draws heavily on Sepher Yetzirah and Sepher Ha-Razim. There are multiple manuscript versions, containing up to seven tractates. The printed version of Sefer Raziel is divided into five books, some of it in the form of a mystical Midrash on Creation. It features an elaborate angelology, magical uses of the zodiac, gematria, names of God, protective spells, and a method of writing magical healing amulets.