Similicaudipteryx is a genus of theropod dinosaur of the family Caudipteridae. Its fossil remains were recovered from the Jiufotang Formation of northeastern China, dating to the early Cretaceous Period (Aptian stage) about 120 million years ago. The genus contains one described species, Similicaudipteryx yixianensis, which was named in 2008 by He, Wang, and Zhou. The name refers to its similarity to the closely related Caudipteryx and its location near the Chinese Yixian beds.