To investigate emotional dysregulation and psychiatric comorbidities associated with DEB-risk in children with type 1 diabetes mellitus (T1DM).A total of 75 children with T1DM aged between 8 and 19 were evaluated by K-SADS-PL to assess psychiatric diagnosis. DEB-risk was evaluated via Diabetes Eating Problem Survey-Revised (DEPS-R). Besides, all participants completed the Childhood Depression Inventory (CDI), Difficulties in Emotion Regulation Scale (DERS), and The State-Trait Anxiety Inventory (STAI).DEPS-R-positive (≥20) was detected in 28% of the participants. The only diagnostic difference was a significantly higher frequency of ED in DEPS-R-positive than DEPS-R-negative (OR = 8.5, CI = 1.94-37.1, p = .004). DEPS-R-positive cases had significantly higher scores of the CDI, STAI, DERS, and the subscales of Goals, Impulse, and Strategies of DERS (CDI U = 266.500, p = .001; STAI U = 288.500,p = .001; DERS U = 229.000, p = .001, Goals U = 283.500, p = .008, Impulse U = 274.000, p = .005, Strategies U = 281.500, p = .007). In stepwise linear regression analysis, STAI-state and DERS scores significantly determined DEB-risk (STAI: β = 0.363, t(60) = 2.33, p = .02, DERS: β = 0.240, t(60) = 4.14, p < .001).This cross-sectional study showed that DEPS-R-positive cases have an 8.5-fold increased risk for ED. DEPS-R-positive ones have difficulties in regulating their emotions and they are incapable of accessing emotion regulation strategies, engaging in goal-directed behavior while under difficult emotions, and impulse control. It can be beneficial for child psychiatrists to screen first for ED in DEPS-R-positive cases who are referred by child endocrinologist. They should also take into consideration anxiety levels and problems in emotion dysregulation in the DEPS-R-positive cases.