Ken Niimura (Madrid, 1981) is a graphic novelist.
His works include Otras jaulas (Other Cages - Astiberri, 2003); En el camino de la madeja (On the Path of the Ball of Yarn - Astiberri, 2005); Umami, which won the Eisner Award for Best Digital Comic; No lo abras jamás (Never Open It - Astiberri, 2021); Peni Parker: After School (Marvel, 2022), and Henshin (Astiberri, 2025).
Alongside writer Joe Kelly, he is the author of Immortal Sergeant (Astiberri, 2023) and the International Manga Award–winning I Kill Giants (Astiberri, 2024), which was adapted into a 2017 film directed by Anders Walter.