Les Champs magnétiques (The Magnetic Fields) is a 1920 book by André Breton and Philippe Soupault.

The book is considered Surrealist, rather than Dadaist, because it attempts to create something new rather than react to an existing work.

Les Champs magnetiques is characterised by rich textured language that often seems to border on the nonsensical.

This is considered a "normal" result of automatic writing and is considerably more logical than the output from other Surrealist techniques, such as "exquisite corpse" (a method whereby each of a group of collaborators, in sequence, adds words or images to a composition).

A typical paragraph in (a translation of) Les Champs magnetiques is: The division between chapters was the point where the writers stopped writing at the end of the day.