Objectives: The purpose of this study was to examine of fatigue, sleep quality, and perceived health for shift workers and to identify variables that influ- ence job involvement in order to develop an intervention program for shift workers to enhance their job involvement. Methods: Data was collected from 124 workers who worked in 3 manufacturing companies with more than 300 manufacturing companies in G-city. Data were analyzed using t-test, ANOVA, Pearson’s correlation and multiple regression analysis with SPSS statistics 27.0 program. Results: Job involvement is related to perceived health was found to have a significant positive correlation and fatigue have a significant negative correlation. Factors affecting job involvement were found to be a significant influencing factor on perceived health. It showed an explanatory power of 32.1%. Conclusions: Therefore, it is necessary to develop and verify job involvement improvement programs that take into account various variables to promote the job involvement of shift workers.