<em>This research aims to determine the relationship between self-adjustment and happiness in adolescent students at the Asy-Syarifah Mranggen Islamic Boarding School. The hypothesis proposed in this research is that there is a positive relationship between self-adjustment and happiness in the students of the Asy-Syarifah Mranggen Islamic Boarding School. The more adaptive the adjustment, the higher the happiness of the students at the Asy-Syarifah Mranggen Islamic Boarding School, and vice versa. The method used in this research is a quantitative method. The characteristics of the respondents in this study were students at the Asy-Syarifah Mranggen Islamic Boarding School with an age range of 12-15 years and a maximum length of stay at the Islamic boarding school of 1 year. Data collection was carried out using the Cluster Random Sampling technique. Research data was collected using two scales, namely the Happiness Scale and the Personal Adjustment Scale. The data analysis method was carried out using Product Moment and the results of the research showed that there was a positive relationship between self-adjustment and happiness in the students of the Asy-Syarifah Mranggen Islamic Boarding School and the correlation coefficient value r?? = 0.551 with a p value &lt; 0.001 was obtained, so the hypothesis in this study was accepted.</em>

<p><strong>Abstract.</strong> Indonesia will face an era of demographic bonus and the health of the productive age is valuable capital for accelerating development. The aim of the research is to determine the effect of healthy behavior on life satisfaction with social support as an intervening variable. Research population of individuals of productive age in Indonesia. The research sample was individuals aged 21 to 45 years who lived in Semarang, Solo, Jakarta, Surabaya and were not on a medical diet. The sampling technique is accidental sampling using Google Form. The data analysis technique uses intervening variable regression with the path analysis method with the SPSS application. The results of data analysis from 245 respondents showed that there was a significant direct influence of healthy living behavior on life satisfaction of 0.182 and there was a significant indirect influence of healthy living behavior on life satisfaction through social support of 0.285. Healthy living behavior must be carried out continuously to support productivity so that it contributes to life satisfaction in the future.</p><strong><em>Keywords</em>:</strong> <em>Healthy Living Behavior; Social Support; Life Satisfaction</em>