The purpose of this study was to identify the degree of family function and to determine factors influencing family function. The subjects for this study were 451 adults and high school students among the general population from J city. Data were collected by questionnaire from Sept. 1 to Nov. 30, 1989. The measurement tool was the Family Function Questionnaire (APGAR) developed by Smilkstein. Data were analysed by statistical methods including Mean, S.D, t-test and ANOVA. The following results were obtained : 1. The mean Family APGAR score was 5.70+/-0. 11, in a range from 0-10. 2. Scores from 0 to 6, which fall into the dysfunctional family range, were recorded for 266 families (59.6%). 3. Significant variables among general characterisics influencing family function were age, sex, marital status, educational levels, monthly income and occupation (p< .001). 4. Significant variables among family characteristics influencing family function were family life cycle (p<.01), utilization of family resources(p<.01) and family atmosphere (p< .001).