约瑟夫·迈克尔·斯特拉日恩斯基（Joseph Michael Straczynski，1954年7月17日－），是一位获奖颇丰的美国编剧、制片人、作家。他曾经写过电视剧本、小说、短篇小说、连环画册以及广播剧。他还是科幻电视剧集《巴比伦五号》（Babylon 5）及其衍生剧集《巴比伦五号：东征》（Crusade）的创作者、执行制片与剧本主编。《巴比伦五号》共110集中，斯特拉日恩斯基写了91集，特别是第三、四季完整的59集，以及第五季只有一集不是他写的。他还撰写了4部《巴比伦五号》的电影剧本。

Joseph Michael Straczynski (/strəˈzɪn.ski/; born July 17, 1954), known professionally as J. Michael Straczynski and informally as Joe Straczynski or jms, is an American writer and producer. He works in films, television series, novels, short stories, comic books, radio dramas and other media. Straczynski is a playwright, former journalist, and author of The Complete Book of Scriptwriting. He was the creator and showrunner for the science fiction television series Babylon 5, its spin-off Crusade, as well as Jeremiah, a series loosely based on Hermann Huppen's comics. Straczynski wrote 92 out of the 110 Babylon 5 episodes, notably including an unbroken 59-episode run through the third and fourth seasons, and all but one episode of the fifth season. He also wrote the four Babylon 5 TV movies produced alongside the series. From 2001 to 2007, he was the writer for the long-running Marvel comic book series The Amazing Spider-Man. He also famously wrote for Thor, Superman, the Superman: Earth One original graphic novels, Before Watchmen and Wonder Woman.