Shinjiro Atae (與真司郎, Atae Shinjirō, born November 26, 1988) is a Japanese singer-songwriter, actor, and model. He debuted as a member of the co-ed group AAA in 2005. Early on in his career, Atae starred in television and film projects including the live-action adaptations of Psychic Detective Yakumo, Delicious Gakuin, Teiō, Guardian Angel, and Ramune.

In 2016, Atae released music solo, beginning with the song "Reunited", and later released his first solo album, This Is Who I Am, as a limited release in 2018. He is also an exclusive model in the magazines Junon and Duet.