Sadoru Chiba is a Japanese manga artist and illustrator known primarily as the artist for the manga series School-Live! Chiba was born on August 13 in Fukuoka Prefecture, Japan. Their professional role is that of a manga creator and illustrator, not a voice actor.

Chiba is best recognized as the illustrator of the manga School-Live!, which is written by Norimitsu Kaihou. The series was serialized in Houbunsha's Manga Time Kirara Forward magazine. For this work, Chiba is credited for the artwork while Kaihou is credited as the original story author. The manga spawned a successful anime television adaptation, for which Chiba is credited as an original creator alongside Kaihou. Chiba also illustrated the sequel manga School-Live! ~Otayori~, again with Kaihou as the writer.

Beyond School-Live!, Chiba has worked on other manga series, including The Idolmaster Cinderella Girls Ensemble!, which is based on the game by Bandai Namco Entertainment. As an illustrator, Chiba has contributed artwork to light novel series such as Ketsuraku Fetishism, Okubyō na Boku to Kamimakuri no Majo, and Sakasama Hō Shōjo. Chiba has also contributed ending illustrations for the anime series Anne Happy♪, Is the Order a Rabbit? BLOOM, and Kaginado. In addition, Chiba provided character designs for the online game Grand Fantasia.

Chiba's artistic identity is closely tied to the manga medium, with a significant portion of their work being published by Houbunsha. A collection of their art, titled Sadoru Chiba Art Collection After School, was published by Houbunsha in January 2020. Their industry significance stems from their visual contribution to School-Live!, a series noted for its juxtaposition of cute character designs with a dark, post-apocalyptic zombie setting. This work remains their most prominent credit in both manga and anime.