The test MRO (Model of Object Relationship) has been administered to a sample of students aged between 12 and 14 years to study the relationship between ADHD and emotional- relational dynamics. The sample was composed of: 11 students with alleged ADHD (inattentive form); 11 coupled students without ADHD, without learning disabilities and with low achievement; 11 coupled students without ADHD, without learning disabilities and with high achievement. The MRO points out how the structure of internal experience modulates emotions and interpersonal relationships. Results showed that students with alleged ADHD produced, in the MRO, more N- (strongly negative valuation) and Pat (relational pathology) answers as compared to control groups. Furthermore, in the group with alleged ADHD a higher number of students who can be included in the MRO cluster 8 (avoiding attitude with false adaptation) was found. On the whole, the results emphasize that people with alleged ADHD show relational implications and a fragile Ego.