Objectives: The aim of this study was to analyze the effect assesssment and related factorson cognitive function in the Elderly. Methods: Korean version of MMSE-K was tested for 40normal in the Elderly in July 15-20 2000. Their ages were 65 or more in years. Results: Age, sex, marriage and education had significant effects on the MMSE-K scores(P<.05). MMSE-K as follow definite dementia$(geq24)$ is 47.5%, definite non-dementia$(leq19)$ is 40.0%, and questionable dementia(20-23) is 12.5% in distributions for cognitive function, respectively. Conclusions: Results indicated that age is increased and female at onset had high cognitive functions.