Background: DM mostly found in Indonesia, especially elderly DM in DIY is first rank after Jateng & Jatim. Controlling DM one of them is by a diet of DM. Controlling DM needs support from family so elderly are more motivated to implement diet DM The purpose of the research: To determine the relationship between family support and elder’s with DM diet discipline at Puskesmas Kasihan 1 Methods: This research is quantitative research with cross sectional approach. Sampling technique using purposive sampling with 23 respondents. Research instruments using demographic data, family support and elder’s with DM diet discipline. The research was conducted in April 2018 in Puskesmas Kasihan 1 Results: The majority of respondents is female, a large propotion was elderly (60-74th), most of the are not work, most of them are not have earn, the majority of elementary school. The majority of the family elderly DM are female, most adults early (20-40th), most have elementary school, the majority is employed works as a laborer, mostly having <Rp. 1.404.760,00 income. All respondents having a support families with good category a member of 23 respondents (100%) and a diet DM elderly with good category a member of 23 respondents (100%). There is relation between family support to diet DM compliance elderly (p=0,037) Conclusion: Most respondents having a family support and compliance diet elderly DM in good category