J.B. is a 1958 play written in free verse by American playwright and poet Archibald MacLeish, and is a modern-day retelling of the story of the biblical figure Job. The play is about J.B. (a stand-in for Job), a devout millionaire with a happy domestic life whose life is ruined. The play went through several incarnations before it was finally published. MacLeish began the work in 1953 as a one-act production, but within three years, had expanded it to a full, three-act manuscript.