The Emotion Regulation Questionnaire (ERQ) is a self-report measure designed to assess the two most widely studied strategies of Gross' model: cognitive reappraisal and expressive suppression. Even though there are two Spanish adaptations of the ERQ, region-specific linguistic factors and dialects must also be considered when adapting a test for another country in order to ensure equivalent evaluations across cultures. The present work developed an Argentinean adaptation of the ERQ. Additionally, the study evaluated its psychometric properties and associations with theoretically related constructs. Study 1 consist of the translation the ERQ into Argentinean Spanish and the analysis of its internal structure and reliability in a sample of 2957 participants. The results supported a two-factor structure with good data fit, adequate factor loadings, and good test-retest reliability and internal consistency. Expected age and gender differences in the use of reappraisal and suppression were also observed. Study 2 analyzed the external validity (concurrent and convergent) of the ERQ adaptation in a sample of 2160 participants. Theory-consistent associations were found with emotion regulation mechanisms, anxiety, depression, and personality traits. In summary, the findings support the validity of a new ERQ adaptation and its use in Argentina.