The purpose of this study was to develop a child behavior checklist that could be completed on a daily basis and that included both positive and negative child behaviors. Participants in the study were six groups of individuals, including one group of clinical psychology graduate students and five groups of either clinic-referred or nonclinic children and their parents. Content, discriminant, concurrent, and statistical conclusion validity data as well as test-retest reliability data were collected on the Daily Child Behavior Checklist (DCBC). The results indicated that the instrument has satisfactory validity and reliability and is reasonably sensitive to daily changes in child behaviors. The advantages and uses of the DCBC are discussed.