In 2005, the Security Council established the Security Council Working Group on Children and Armed Conflict in order to help implement its policy to ensure the application of international legal standards for the protection of children in armed conflict. The Working Group makes recommendations that enable the Council to take action of necessary. It is therefore relevant to consider these recommendations from a legal perspective. This paper addresses the question whether the Working Group should be regarded as a policy mechanism at the disposal of the Security Council, which utilises the language of the law for peace-related purposes, or rather as a semi-legal body which engages with and applies international law and which should thus be taken into account as a body that may influence the development of law regarding children in armed conflict. For that purpose, the paper focuses on how the Working Group engages with international law relevant to children in armed conflict. This results in a legal appraisal of the Working Group's application and development of the international legal standards protective of children in armed conflict situations.