The Asthma Problem Behavior Checklist (APBC) has proved to be an accurate and invaluable instrument for pinpointing potential behavioral problems in children with the disorder. This article presents the Revised Asthma Problem Behavior Checklist (RAPBC). The value of the RAPBC is that: (a) it has proven reliability when tested with asthmatic adults; (b) the change from a dichotomous yes/no format, used in the APBC, to a 5-point Likert-type answer format adds greater sensitivity to the instrument; and (c) data gathered with the RAPBC compare favorably to information gathered in two previous studies with the APBC. Considering the reliability and validity of the RAPBC, it should prove useful in both clinical and research settings.