The main objective of this study was to determine the relationship between the management of public investment projects and quality of life in the city of Lamas, 2022. The approach was quantitative, basic type, non-experimental cross-sectional design and correlational level. The population consisted of 6,668 citizens, the sample included only 363, and surveys and questionnaires were applied as data collection techniques and instruments, which were reviewed and validated by experts. The following results were obtained: the management of public investment projects was found to be at a medium level, 77%, 15% low and the remaining 8% indicated that it was high. On the other hand, 80% indicated a medium level quality of life, 11% high and 10% low. It concludes that there is a moderate and significant positive relationship between public investment project management and quality of life in the city of Lamas, with a correlation coefficient of Spearman's Rho 0.611 and a p-value 0.000 < 0.01; likewise, they determine a dependence of 37.33%. This allows the research hypothesis to be accepted and the null hypothesis to be rejected.