This study examined mediators of relations between adolescent religiousness and pornography use. The sample consisted of 419 adolescents (ages 15-18 years; M age = 15.68, SD = 0.98; 56% male). It was hypothesized that religiousness (religious internalization and involvement) would protect adolescents from pornography use (accidental and intentional viewing) by increasing self-regulation, conservative attitudes towards pornography, and social control against pornography. Path analyses revealed religious internalization and involvement were indirectly linked to intentional viewing through all three mediators. For accidental viewing, the only indirect effects were from religious internalization through self-regulation and social control, and from religious involvement through social control. Thus, religiousness may protect adolescents from intentional and accidental exposure to pornography. (Contains 3 tables and 1 figure.)