This study aims to investigate the influence of psychosomatic and emotional status on food portion sizes (PS) consumption from high energy dense food groups in European children and adolescents. We hypothesize that psychosomatic and emotional status may have a significant association with the PS selection of energy-dense food. The study included 7,355 children aged between 2 and 9.9 years at baseline (T0) (48.8% females); 3,869 after 2 years (T1) (48.2% females), and 2,971 (51.8% females) after 6 years of follow-up (T3). Psychosomatic and emotional status were measured using Emotional well-being during the last week score (KINDL) and Strengths and Difficulties Questionnaire (SDQ). PS were calculated considering the amount of foods eaten per day (grams) assessed using 24 h-recalls. The associations between emotional status indicators and PS from selected energy-dense food groups were assessed by multilevel linear regression models. In the cross-sectional analysis, we observed that higher KINDL scores were linked to lower portion size (PS) consumption from sweet bakery products and savory snacks in both genders. Moreover, we found that adolescent females with high emotional and peer problem scores tended to consume larger PS of carbohydrate-rich and sugar-fatty food items (p<0.017). Furthermore, in the longitudinal analysis, higher peer problem scores were associated with increased PS from bread and rolls, margarine and lipids, and dairy products in all genders and age groups (p<0.017). In adolescents, psychosomatic and emotional status could be a trigger for consuming large PS from carbohydrate-rich and sugar-fatty energy-dense foods. Thus, nutritional interventions should consider emotional status to decrease unhealthy dietary habits in children and adolescents.