Don't Let Mother Know, also The Bliss of Ignorance is a 1913 American silent film drama produced by Hardee Kirkland.

The film stars Maxwell Sargent, Carl Winterhoff, Louise Kelly, Adrienne Kroell and Jack Jonson.

The film status is uncertain but a release flier survives which is now at the Margaret Herrick Library at the Academy of Motion Pictures Arts and Sciences.

Rough and Ready Tom Moran discovers an inebriated individual, Dick Baird who is getting the worst of a quelling fight against odds and rescues the under man.

He has just written home saying that he will return on a visit, but it is too late; he is next day slugged to death by a robber, his last words to his friend being: "Don't let mother know".