Postpartum women experience both physical and psychological changes. Previous studies have shown that women who delivered via caesarean section tend to have lower levels of Subjective Well-Being (SWB) than those who gave birth vaginally. If left unaddressed, these psychological challenges may lead to anxiety or depression. This study aimed to investigate the impact of Mindful Self-Compassion (MSC) training on improving the Subjective Well-Being of postpartum women following caesarean delivery. This research employed a randomized controlled pilot trial (waitlist control) with pretest–posttest assessments and utilized non-parametric analysis (Mann-Whitney U Test). The Scale of Positive and Negative Experience (SPANE), Satisfaction with Life Scale (SWLS), and Self-Compassion Scale (SCS) were used to measure Subjective Well-Being and self-compassion. The results showed a significant increase in Subjective Well-Being among participants in the experimental group after receiving the MSC training. The findings suggest that MSC training is effective in improving the well-being of postpartum women who delivered via caesarean section.