The present study was conducted in four phases and constructed a self-report parenting instrument for use with Mexican immigrant mothers of children aged 6 to 10. The 14-item measure was based on semistructured qualitative interviews with Mexican immigrant mothers (N = 10), was refined by a focus group of Mexican immigrant mothers (N = 5), and was then completed by a larger sample of Mexican immigrant mothers (N = 168). Children’s socioemotional and behavioral competence was examined on a subset of children (N = 30) from family drawings and teacher reports of behavior. Items of the parenting instrument pertained to one of three general parenting constructs: Warmth, Monitoring, and Discipline. Using confirmatory factor analyses (CFA) and respecification procedures, the three models were found to be a good fit with the data. Subscales consisted of moderate levels of internal consistency and predicted several children’s behaviors.