This study empirically verified the mediating and double mediating effects of two psychological factors, grit and resilience, in social support’s effect on job satisfaction in early childhood education. Data were collected from 514 infant and toddler teachers employed in educational institutions in Daegu and Gyeongbuk. Analysis was performed using SPSS 29.0, AMOS 29.0, and PROCESS Macro programs (Models 4 and 6). Results showed, first, a statistically significant, positive correla tion between social support, grit, resilience, and job satisfaction. Second, grit’s partial mediating effect was confirmed in the relationship between social support and job satisfaction. Resilience also partially and significantly mediated social support’s effect on job satisfaction. Third, in the relationship between social support and job satisfaction, grit and resilience’s significant double mediating effect was verified. These results suggest that to improve early childhood teachers’ job satisfaction, integrating and strengthening internal psychological resources such as grit and resilience are as necessary as doing the same in external environments such as social support. In particular, this study contributes greatly to the literature by empirically verifying a more sophisticated path through a double parameter model beyond single parameter analysis in explaining social support’s positive effects on teachers. Future studies can provide more practical basic data for teacher support policy and program development by conducting qualitative research that reflects the educational field’s actual context.