Child maltreatment is a leading cause of health inequality, with the socioeconomically disadvantaged more at risk, perpetuating social injustice. Though it is a priority in most countries of the WHO European Region, few devote adequate resources and attention to its prevention. This report outlines the high burden of child maltreatment, its causes and consequences and the cost-effectiveness of prevention programs. It makes compelling arguments for increased investment in prevention and, by offering policy-makers a preventive approach based on strong evidence and shared experience, it will help them respond to increased demands from the public to tackle child maltreatment.