Background: Every year there is always an increase in number of elderly, the increasing number of elderly in Indonesia, increasing the risk of diseases that occurs in elderly patients. Family supports is considerably needed by elderly. Poor family support might result in mental disorder called insomnia. Insomnia is one of the natural problems of elderly. Methods: This research looking for the relationship between insomnia and family supports in elderly. This reasearch using cross sectional method involving 35 partisipants. The data collection is guided by structured questionnaire. The data is collected from Family Supports quaestionnaires that has been tasted its validation and reliability before distributing it and the occurrence of elder’s insomnia questionnaires with KSPBJ-IRS. Research data were analyzed using chi square test. Results: From 35 respondents, family supports high for 22 respondents (20,0%) and we obtained 19 respondents (54,3%) experiencing insomnia and 16 respondents (45,7%) did not experience insomnia. The results of chi square test showed taht the significance value of family supports and insomnia in elderly is 0,001 (p<0,005) with the contingensy coefficient as +0,535. Conclutions: There was a significant relation between family support and insomnia on elderly in posyandu elderly Karangjati, Sleman, Yogyakarta.