The study aimed to determine psychological capital as a mediator of mental health to job satisfaction and performance of public elementary school teachers. The study employed the descriptive correlational design, which includes 122 out of 158 teachers in Dapdapan District, Division of San Pablo City, during the School Year 2022-2023. A six-part survey questionnaire was utilized to determine and interpret the respondents profile, psychological capital, mental health, job satisfaction, and job performance. The results revealed a significant relationship between the status of mental health, psychological capital, job satisfaction, and job performance. And also, there is a significant relationship between psychological capital, job satisfaction, and job performance. On the other hand, psychological capital partially mediated the relationship between mental health and job satisfaction. Furthermore, the hypothesis that psychological capital does not significantly mediate the relationship between mental health and job performance was not supported by the result of the study when the test of moderation was made, therefore, was not sustained. ABSTRACT   The study aimed to determine psychological capital as a mediator of mental health to job satisfaction and performance of public elementary school teachers. The study employed the descriptive correlational design, which includes 122 out of 158 teachers in Dapdapan District, Division of San Pablo City, during the School Year 2022-2023. A six-part survey questionnaire was utilized to determine and interpret the respondents profile, psychological capital, mental health, job satisfaction, and job performance. The results revealed a significant relationship between the status of mental health, psychological capital, job satisfaction, and job performance. And also, there is a significant relationship between psychological capital, job satisfaction, and job performance. On the other hand, psychological capital partially mediated the relationship between mental health and job satisfaction. Furthermore, the hypothesis that psychological capital does not significantly mediate the relationship between mental health and job performance was not supported by the result of the study when the test of moderation was made, therefore, was not sustained.