This Is My Affair is a 1937 American period crime film directed by William A. Seiter and starring Robert Taylor, Barbara Stanwyck, Victor McLaglen and Brian Donlevy.

Her stepbrother, Batiste, not only owns the casino in Saint Paul, Minnesota where she performs, but is also one of the ringleaders of the gang.

He does not believe her until an official finally remembers McKinley instructing him to read a secret paper in the event of a letter being received with a certain symbol on it and him being unavailable.

Writing for Night and Day in 1937, Graham Greene gave the film a good review, asserting that it was "the best American melodrama of the year".

Although Greene notes the unrealistic aspects of the plot, he praises the "cunning direction" and expresses enjoyment of the tension-imbuing "sense of doom" present in many scenes.