This study verified the mediating effects of self-concept clarity and rejection sensitivity in the impact of adolescents’ covert narcissism on social anxiety. The subjects of this study were 545 middle and high school students aged 15-19 in South Korea. The study analyzed collected data with the SPSS PROCESS macro (models 4 and 6). The results of this study are as follows: First, it was found that the self-concept clarity of adolescents weakened the effect of covert narcissism on social anxiety, and second, rejection sensitivity strengthened the effect between these two variables. Third, covert narcissism had a positive effect on social anxiety. In addition, the double mediating effect of self-concept clarity and rejection sensitivity were also shown to be significant in the relationship between covert narcissism and social anxiety. Based on the results of this study, we discussed what can be applied in counseling for adolescents with covert narcissistic tendencies.