Research Background: Diabetes Milletus type 2 is a metabolic disorder due to insulin resistance. Obesity is a risky factor for insulin resistance. Obesity has effect on lipid levels including total cholesterol. Body Mass Index (BMI) is a parameter for measuring the existence of excess weight. For patients with diabetes mellitus type 2, ineffective insulin will result in several metabolic disorders including lipids. Lipid metabolic disorder is related to total cholesterol levels. Research Objective: This research is aimed at finding out the correlation between body mass index (BMI) and cholesterol levels of patients with diabetes mellitus type 2. Research Method: Observational method with cross sectional approach was used as the research method. 30 patients of internal disease poly at PKU Muhammadiyah Yogyakarta were the sample of the research. The research was done from May 2017-August 2018 in accordance with inclusion and exclusion criteria, the required data on height, weight, and blood check for total cholesterol. The data were analyzed using analytical correlation Pearson (normal distribution). Research Findings: The characteristics based on age: 30-39 are 2 (2.7%), 40-49 are 3 (10%), 50-59 are 11 (36, 7%), 60-69 are 11 (36, 7%), 70-79 are 2 (6.7%), 80-89 are 1 (3.3%). The characteristics based on sex: men are 12 (40%) and women are 18 (60%). The characteristics based on BMI: normal are 5 (16, 7%), pre-obesity are 3 (10%), obesity is 14 (46.7 %) and obesity is 3 (10%), obesity is 14 (46.7) and obesity II is 8 (26.7%). The characteristics based on total cholesterol: normal are 13 (43, 3%), medium is 9 (30%), danger is 8 (26, 7%) and the correlation analysis of BMI with total cholesterol is found r = 0.14 and p = 0.461. Conclusion: ThResearch Background: Diabetes Milletus type 2 is a metabolic disorder due to insulin resistance. Obesity is a risky factor for insulin resistance. Obesity has effect on lipid levels including total cholesterol. Body Mass Index (BMI) is a parameter for measuring the existence of excess weight. For patients with diabetes mellitus type 2, ineffective insulin will result in several metabolic disorders including lipids. Lipid metabolic disorder is related to total cholesterol levels. Research Objective: This research is aimed at finding out the correlation between body mass index (BMI) and cholesterol levels of patients with diabetes mellitus type 2. Research Method: Observational method with cross sectional approach was used as the research method. 30 patients of internal disease poly at PKU Muhammadiyah Yogyakarta were the sample of the research. The research was done from May 2017-August 2018 in accordance with inclusion and exclusion criteria, the required data on height, weight, and blood check for total cholesterol. The data were analyzed using analytical correlation Pearson (normal distribution). Research Findings: The characteristics based on age: 30-39 are 2 (2.7%), 40-49 are 3 (10%), 50-59 are 11 (36, 7%), 60-69 are 11 (36, 7%), 70-79 are 2 (6.7%), 80-89 are 1 (3.3%). The characteristics based on sex: men are 12 (40%) and women are 18 (60%). The characteristics based on BMI: normal are 5 (16, 7%), pre-obesity are 3 (10%), obesity is 14 (46.7 %) and obesity is 3 (10%), obesity is 14 (46.7) and obesity II is 8 (26.7%). The characteristics based on total cholesterol: normal are 13 (43, 3%), medium is 9 (30%), danger is 8 (26, 7%) and the correlation analysis of BMI with total cholesterol is found r = 0.14 and p = 0.461. Conclusion: There is no significant correlation between BMI and total cholesterol levels of the patients with diabetes mellitus type 2.ere is no significant correlation between BMI and total cholesterol levels of the patients with diabetes mellitus type 2.