Background: In the diagnostic process of psychological disorders, we can find common characteristics to different problems, being able to explain a variety of clinical difficulties and comorbidities from this cross-sectional category, which has been called transdiagnostic. Being emotional regulation a transdiagnostic variable that is defined as the ability of the person to make use of resources or skills to modulate the behavioral response produced after experiencing a moderate to high intensity emotion. Objective: To explain the impact of the emotional regulation variable in clinical theory and practice through a transdiagnostic look. Discussion: The term transdiagnosis arises from a series of drawbacks in its foundation and practice, being these: dissatisfaction with traditional models such as the International Classification of Diseases and Disorders related t...