Objective: This article examines the psychometric properties of the Chinese version of the Conners' Parent and Teacher Rating Scales-Revised: Short Forms (CPRS-R:S-C and CTRS-R:S-C) in a representative sample of 2,584 first to ninth graders in Taipei and 479 clinical participants (274 with ADHD). Method: The instruments include the CPRS-R:S-C, CTRS-R:S-C, and the Chinese version of the Swanson, Kotkin, Atkins, M-Flynn, and Pelham Scale. Results: Results show satisfactory factor structure, test-retest reliability, internal consistency, and convergent validity for all the subscales of the CTRS-R:S-C and CPRS-R:S-C. They clearly distinguish clinical participants with ADHD from those without. Conclusion: Our findings suggest that the CPRS-R:S-C and CTRS-R:S-C are reliable and valid instruments for measuring inattention and hyperactivity in both clinical and community settings in the Chinese population in Taipei. (Contains 5 tables.)