满岛真之介（みつしま しんのすけ），1989年5月30日出生于日本冲绳县，日本影视男演员，毕业于冲绳县胡差高中。

2010年，出演东京艺术剧场的舞台剧《可怕的家长们》，从而正式进入演艺圈。2011年，出演个人首部电视剧《花样少年少女2》。2012年，出演个人首部电影《11·25自决之日 三岛由纪夫与年轻人们》；同年，获得“第四届日本TAMA电影节”最佳新人男演员奖。2013年，主演喜剧电影《风俗店之行改变了我的人生》 。2014年，在战争剧《永远的0》中饰演井崎源次郎 。2015年，主演都市情感剧《恋爱时代》。2016年，主演爱情电影《跨越栅栏》 。2017年，参演悬疑电影《第三度嫌疑人》 。2020年，主演电视剧《咖喱之歌》。

滿島真之介，日本男演員，沖繩縣沖繩市出身。有四分之一法國血統，姊姊為演員滿島光。2012年以電影《11·25自決之日》獲報知電影獎和日本放送電影藝術大獎最佳新人獎。

Shinnosuke Mitsushima (満島 真之介 Mitsushima Shinnosuke, born 30 May 1989) is a Japanese actor. He graduated from Okinawa Prefecture Koza High School. He is represented by Humanitè.

Mitsushima's older sister is former Folder and Folder 5 member turned actress Hikari Mitsushima. His younger sister is model Minami Mitsushima. Mitsushima's younger brother is Kotaro Mitsushima, a basketball player for Rizing Zephyr Fukuoka of the Japan Basketball League.

After graduating from high school Mitsushima moved to Tokyo from Okinawa, he worked as an after-school childcare worker there, and became a production director for the film Be Sure to Share.

After living in Tokyo for about two years, he took a chance to cycle around Japan for seven months from May to November 2009. Mitsushima traveled around the country from Hokkaido to Kagoshima Prefecture. On the street, he saw posters, signboards, and magazines of a film in which his older sister appeared and realized that his sister "impressed a lot of people" and he has "to work hard as well", and came to aim for the way of acting. Later in December, Mitsushima joined to the office in which his sister has belonged.

In 2010, he made his acting debut as the lover of Tomoko Nakajima's character in Osorubeki Oya-tachi performed in the Tokyo Metropolitan Theatre.

Mitsushima made his starring debut in the film Zoku Ittara Jinsei Kawatta www released 9 November 2013.

He later married his sister Hikari's manager at the end of 2014.

In 2016, he voiced the main character Satoru Fujinuma in the animated television series Erased, in which he made his voice acting debut.