Sexual self-efficacy-the belief in one's ability to engage in desired and to refuse unwanted, sexual activities and behaviors-is an important feature in promoting adolescent sexual health and well-being. One factor that may affect the development of sexual self-efficacy is child sexual abuse. However, little is known about the processes underlying the relation between child sexual abuse and sexual self-efficacy. Using longitudinal data from a sample of 739 adolescent girls and boys aged between 14 and 18 years, we examined the mediational role of two "silencing the self" attitudes and behaviors in romantic relationships-self-silencing, i.e., inhibiting fulfilling one's own needs, and divided self, i.e., presenting an outer compliant self-in the associations between child sexual abuse severity and two dimensions of sexual self-efficacy: the ability to set clear sexual limits and the ability to use sexual protection. Results of path analysis showed that child sexual abuse severity was associated with more self-silencing and more divided self. In turn, self-silencing was associated with lower protection use self-efficacy, whereas divided self was associated with lower limit-setting and protection use self-efficacy. Thus, self-silencing strategies in romantic relationships mediated the associations between child sexual abuse severity and lower sexual self-efficacy. The overall findings may inform the development of prevention/intervention programs that target the enhancement of an integrated sense of self in intimate relationships to promote assertive strategies in sexual situations.