<p>The present study examines the disagreement between parents and teachers on the Oppositional Defiant Disorder Symptomatology (ODS) in children and how sociodemographic factors like gender and socio-economic status (SES); and emotional characteristics such as aggressiveness, temperament, callousness; anxious and depressive symptoms, and irritability may be predictors of this incongruence. A community sample of 614 3-year-old, followed up until age 14 (<i>N</i> = 287) was obtained from a longitudinal study that began in 2009. Parents and teachers completed an ODS scale and multiple questionnaires about child´s emotional difficulties. Analyses indicated that parent-teacher ratings were discrepant, and this disagreement diminished with age (Intraclass Correlation Coefficient = 0.12 to 0.69) with parents consistently reporting higher ODS scores compared to teachers across various ages. Predictors of parent-teacher disagreement on ODS were analyzed using polynomial regression with second and third order interactions. Results revealed that disagreement was higher when rating females, and for children belonging to low + low/medium or high SES groups. Lower ratings of aggressiveness, callousness and irritability, while higher scores of effortful control were significant predictors of higher parent-teacher ODS discrepancies. Research on how child affective variables influence multi-informant disagreement could lead to better clinical practice in addition to more accurate assessment and diagnosis in the infant-juvenile population.</p>