The Idolmaster Cinderella Girls (アイドルマスター シンデレラガールズ, Aidorumasuta Shinderera Gāruzu, officially stylized as THE iDOLM@STER CINDERELLA GIRLS) is a Japanese free-to-play simulation video game developed by Cygames and Bandai Namco Games for the Mobage social network platform for mobile phones. It was first released on November 28, 2011 for feature phones, and compatibility was extended to iOS and Android devices on December 16, 2011. The game is based on The Idolmaster franchise, and features a cast of new idol characters.

The story in Cinderella Girls follows the career of a producer in charge of leading and training prospective pop idols to stardom. Its gameplay follows a collectible card game format in which each idol is represented as a card, which the player may use to form a unit of idols to train in lessons, take to jobs, and compete against opponents. Cinderella Girls has made transitions to other media. An anime television series adaptation produced by A-1 Pictures began airing in January 2015. Eight manga series, three sets of manga anthologies, two Internet radio talk shows featuring the series' voice actresses, image song singles and albums, and live concerts have also been produced.