Entering early adulthood, a person will be in the quarter-life crisis phase (a quarter century at the age of 20-25 years). This identity crisis occurs due to an individual's unpreparedness during the transition from adolescence to adulthood. Anxiety itself is a condition of worry that complains about the fear that something frightening will happen. In this study, the author chose a theme related to the relationship between religiousness and self-efficacy towards social anxiety faced by students of UIN Walisongo Semarang, aiming to delve deeper into the connection between the nature of religiosity and self-efficacy or the ability to meet one's own demands against social anxiety being faced during the quarter-life crisis phase. This research employs a qualitative approach with a sample of 100 students from UIN Walisongo Semarang, conducted in May-June 2025, with results indicating a negative relationship between religiosity and social anxiety. with a significance value of 0.028 which is less than 0.05 (0.028 < 0.05) so the correlation between the two variables is declared significant. There is a negative relationship between self-efficacy and social anxiety with a sig. (2-tailed) value of 0.046 which is less than 0.05 (0.046 < 0.05). There is a significant simultaneous relationship between religiosity and self-efficacy with social anxiety with a (sig, F change) value of 0.012. Since the sig. F change value of 0.012 < 0.05, the correlation between these variables is declared significant. It can be concluded that there is a relationship between religiosity and self-efficacy regarding social anxiety among UIN Walisongo Semarang students when facing the quarter-life crisis.