Margot Frank was Anne Frank's older sister by three years.
Annelies Marie `` Anne '' Frank ( [ ʔanəliːs maˈʁiː ˈʔanə ˈfʁaŋk ] ; [ ʔɑnəˈlis maˈri ˈʔɑnə ˈfrɑŋk ] ; 12 June 1929 -- February or March 1945 ) was a German-born diarist . Margot Betty Frank ( February 16 , 1926 -- February 1945 ) was the eldest daughter of Otto Frank and Edith Frank and the older sister of Anne Frank .