In Shakespeare studies, the problem plays are plays written by William Shakespeare that are characterised by their complex and ambiguous tone, which shifts violently between more straightforward comic material and dark, psychological drama. Shakespeare's problem plays eschew the traditional trappings of both comedy and tragedy, and are sometimes cited as early predecessors to the tragicomedy.
The term was coined by critic F. S. Boas in Shakespeare and His Predecessors (1896). Boas' use of the phrase was derived from a type of drama that was popular at the time of his writing, most commonly associated with the Norwegian playwright Henrik Ibsen. In these problem plays, the situation faced by the protagonist is put forward by the author as a representative instance of a contemporary social problem. The term can refer to the subject matter of the play, or to a classification "problem" with the plays themselves.