Purpose: The purpose of this study was to determine the influence of job-seeking stress, career decision-making self-efficacy and self-esteem on subjective happiness of university students. Methods: The participants were 281 university students in D city. Data were collected using a structured questionnaire. The data were analyzed using SPSS/WIN 19.0 using one-way ANOVA, t-test, Pearson correlation, and multiple regression. Results: Subjective happiness showed positive association with career decision-making self-efficacy, self-esteem and negative association with job-seeking stress. Factors that had an influence on subjective happiness were monthly family income (less than two million won ${\beta}$=-.263, p<.001, between two million won and four million won ${\beta}$=-.207, p<.001), major satisfaction (very unsatisfied ${\beta}$=-.221, p<.001, satisfied ${\beta}$=.161, p=.003), gender (female ${\beta}$=-.154, p=.005), subjective health (unhealthy ${\beta}$=-.134, p=.013), and school year (sophomore ${\beta}$=-.123, p=.024). These factors explained 22.6% of the variance in their subjective happiness. Conclusion: The results of this study showed that more positive career decision-making self-efficacy, self-esteem and more negative job-seeking stress were needed for their subjective happiness. This study also indicated that economic status, major satisfaction, gender, and subjective health were very important in predicting their subjective happiness. Thus, to improve their happiness, it would be necessary to consider both intrinsic factors such as major satisfaction and extrinsic factors such as general characteristics.