Background: Indonesia suffers triple burden and is a country with a high prevalence of stunting. Infants born prematurely contribute to stunting while mothers experience self-efficacy problems. Objectives: This study aims to analyze the effect of the PITA continuing nursing intervention model on the self-efficacy of preterm infant mothers. Methods: This study is a true experimental study on 44 mother-preterm infant dyads were obtained by simple random sampling, block randomization, with an intervention in the form of structured and continuous health education from the hospital until 12 weeks after discharge or until the infant reaches three months of correction age. Data were analyzed using dependent t-test, independent t-test, and ANCOVA test. Results: There was an effect of the PITA Nursing Intervention Model on maternal self-efficacy after controlling for parity, previous experience caring for premature infants, education, and maternal age (p-value = 0.011). The correlation test showed that there was a correlation between the PITA Nursing Intervention Model and maternal self-efficacy (p-value <0.001). Conclusion: The PITA Nursing Intervention Model was effective in increasing maternal self-efficacy. Researchers suggest examining the relationship between maternal self-efficacy and the practice of caring for premature infants after hospitalization. © 2025 Neonatal Nurses Association