This study examined whether Mentalization-Based Treatment for Children (MBT-C) could improve emotion regulation and emotional awareness among children in foster care. Thirty children aged 7-12 years were randomly assigned to either an MBT-C intervention group or a control group. The intervention group participated in 12 treatment sessions, while the control group received no intervention. Results showed that children who received MBT-C demonstrated improvements in adaptive emotion regulation and emotional awareness, and these improvements were maintained two months later. The findings suggest that MBT-C may be a useful intervention for supporting the emotional development of children in foster care.