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Due to a rapidly aging society, the future Korea mortality rate is important for planning national nancialstrategies and social security policies. Old age mortality statistics are very limited in their ability to project afuture mortality rate; therefore, it is essential to accurately estimate the old age mortality rate. In this paper, weshowthattheCKmodelwithaRelationalmodelasabasemodelprovidesaccurateestimatesofoldagemortalityrates.Keywords: CK model, relational model, force of mortality, life expectancy. 1.         ,        .          .     ,         , .    .  ,     100 .     .  3.,    .  Gompertz,Makeham, Perks, Beard, Heligman Pollard    .      Gom-pertz (1825)  “ (law of mortality)”.              ,      .  . .   (model life table system),          .

An Estimation of an Old Age Mortality Rate Using CK Model and Relational Model