Introduction: : Diabetes mellitus is one of metabolic diseases characterized by an increased blood glucose levels. Eosinophil, one of leukocyte components, have an important role in metabolic homeostasis, especially in type 2 diabetes patients. Leukocyte are responsible for cellular defense and humoral response to inflammatory cells in blood vessels. Glycated hemoglobin (HbA1c) is a test to measure and control blood glucose levels. A higher serum HbA1c level indicates a greater risk of a development of DM-related complications. This study used an observational analytic design with a cross sectional approach and involved 100 research subjects. Data were analyzed with Kolm- ogorov-Smirnov and Pearson correlation test with significance of p> 0.05 and p <0.05, respectively. There was no significant correlation between ELR and HbA1c in type 2 DM patients with r=-0,181 and p=0,071 (p>0,05). Further research was needed to determine the correlation between ELR and other fasting blood glucose parameters or inflam- matory markers, in addition to HbA1c levels.