Timm Thaler oder Das verkaufte Lachen (roughly translated as Timm Thaler, or the Traded Laughter and best known as simply Timm Thaler) is a 1962 children's novel by German author James Krüss.

Regarded by the Oxford Encyclopedia of Children's Literature as Krüss' best known children's book, Timm Thaler tells the story of a boy who trades his enchanting laughter to a wealthy mysterious Mephistopheles-like Baron in exchange for the ability to win any bet he makes.

Regretting the exchange, he undertakes a four-year journey to win his laughter back.

In 1979, Krüss wrote a sequel novel, Timm Thalers Puppen oder Die verkaufte Menschenliebe (roughly translated as Timm Thaler's Puppets, or the Traded Love for Mankind).

[3] The story was later re-adapted into an animated German television series in 2002.