The present study explored the effect of ego-resilience, wage satisfaction level, and social support on collective self-esteem, and examined the cross level interaction effect of social support and wage satisfaction. Data were collected from 355 child care teachers from 46 child care centers. The multi-level analysis, which constituted Level 1 (ego-resilience) and Level 2 (social support and wage satisfaction), was performed using Mplus 7.2. The results revealed that higher ego-resilience was associated with higher collective self-esteem. Additionally, collective self-esteem tended to be higher in institutions with higher social support. In contrast, the wage satisfaction level of the institution did not affect the collective self-esteem of the employed teachers. Further, wage satisfaction moderated the relationship between ego-resilience and collective self-esteem, while the moderating effect of social support was not significant. These results imply that wage satisfaction and social support at an institution have unique contributions to collective self-esteem, as a direct factor and moderator.