Self-esteem, which has a very important effect on cognition, emotion, motivation and behavior, is regarded one of the key elements of mental health. In studies examining the relationships between both job performance and job satisfaction with self-esteem, it is stated that self-esteem generally predicts job performance, and job satisfaction is a protective factor in terms of self-esteem, subjective well-being and happiness. The aim of this study is to examine whether subjective well-being has a mediating role in the relationship between self-esteem, job satisfaction and job performance and to find its function in explaining employees' self-esteem. For this purpose, data were collected online from a total of 508 working people between the ages of 18-65 (M=31.65; s=8.65), 217 men (42.7%) and 291 women (57.3%). Coopersmith Self-Esteem Inventory, Subjective Well-Being Index, and Osgood Semantic Differential Measures for Job Performance and Job Satisfaction were used as data collection tools. The data obtained were analyzed by path analysis, and it was found that subjective well-being predicted self-esteem by mediating job performance and job satisfaction.