Abstract： Objective To compare the reliability and validity of job content questionnaire (JCQ1.0) and effort-reward imbalance (ERI) questionnaire in job stress study for civil aviation staff. Methods One hundred and ten individuals were investigated by JCQ1. 0 and ERI questionnaire for job stress, and their reliability and validity were evaluated. Results In JCQ1. 0, high-strain, active, passive,and low-strain workers accounted for 23.6%, 20. 9%, 24. 5%, and 30. 9%. Job stress was found in 59. 1% in ERI. The internal consistency reliabilities (Cronbach α) of the 3 dimensions in JCQ1.0 ranged from 0. 10 to 0. 51, and the split-half reliability was 0. 50; however, the internal consistency reliabilities ( Cronbach α) of the 3 dimensions in ERI ranged from 0. 35 to 0. 79, and the split-half reliability was 0. 78.Most items of both questionnaires showed good construct validities. In factor analysis, total variance contribution was 64. 62% ( JCQ1. 0 ) and 58.08% ( ERI ), respectively. Conclusion ERI may be a reliable and valid tool of job stress assessment; however, JCQ1.0 seems to need further modification.