An anime adaptation for the Black Bullet Light Novel was announced at the Dengeki Bunko Fall Festival 2013 event on Sunday; October 6, 2013. Directing the anime is Masayuki Kojima at Kinema Citrus from scrips by Tatsuhiko Urahata. Chiho Umishima is designing the characters, while Shiro Sagisu is composing the music. Leading the cast for the anime is Yuuki Kaji as Rentaro Satomi, Rina Hidaka as Enju Aihara, and Rikiya Koyama as Kagetane Hiruko. The anime is set to premiere April 8, 2014. Joining the main cast for the April Anime are voice actors Aoi Yūki as Kohina Hiruko, Yui Horie as Kisara Tendo, Yuko Kaida as Sumire Muroto, Tomoyo Kurosawa as Tina Sprout, and Aki Toyosaki as Seitenshi.
The Black Bullet Anime's first promotional video streamed December 27, 2013; featuring the Monolith and various locations in the Tokyo Area. Characters featured in the promo are Promoter Rentaro Satomi, Initiator Enju Aihara and Gastrea Sumiaki Okajima. Along with the video, various animated images were released on the Anime's main Website.