Sub-Saharan Africa has the highest rate of adolescent pregnancy in the world, with an estimated prevalence of 19.3%. Whereas adolescent pregnancy is considered on the policy agenda as a public health challenge in many sub-Saharan African countries, the mental health impact, although dire, has not received commensurate attention in the policy space. This is not unconnected with sociocultural norms and stigma associated, not just with mental health, but with teenage pregnancy as well. Similarly, adult maternal mental health, though often relegated, has been receiving increasing attention. But pregnant teenagers are often not the focus of available mental health interventions, even though they are more vulnerable to the same pathophysiological stressors, as well as being uniquely exposed to extreme sociocultural and economic stressors. In this viewpoint, we argue that prioritizing the mental health of adolescent mothers is critical in sub-Saharan Africa. We also make important recommendations to ensure that pregnant adolescents receive the mental health services and support they need.