Frank Jæger (19 June 1926 - 4 July 1977) was a Danish writer most known for his poetry and radio plays. He received the Grand Prize of the Danish Academy in 1969. He also edited two volumes of Heretica magazine with Tage Skou-Hansen.
Den posthumt udgivne samling Miraklernes Bog udkom første gang som Gyldendals julebog 1977 og består af en række ikke tidligere publicerede digte, udvalgt af Frank Jægers ven Thorkild Bjørnvig.