The article elaborates on the EU Green Bond Standard, a cornerstone of the Proposal for a Regulation on European green bonds that was put forward by the European Commission in July 2021. Within the analysis, three research questions are posed. First, the article deals with the question of whether the EU Green Bond Standard is really needed; particularly, whether there is a need for EU regulatory intervention on the EU green bond market. Second, it examines the method of regulation which was adopted for the EU Green Bond Standard. Specifically, does this standard differ and offer any added value compared to private standards for the issuance of green bonds? Finally, the article discusses the impact of the EU Green Bond Standard on the EU green bond market. Within this section, the questions of fragmentation and regulatory competition between public (EU) and private regimes are dealt with. The article ends with proposals for modifications of the EU Green Bond Standard. It has been suggested that the EU Green Bond Standard should have a mandatory character for all issuances of green bonds on the EU green bond market. Private standards should not be replaced by the EU Green Bond Standard but only reconciled with it. With regard to its content, the EU Green Bond Standard should constitute a mixture of public and private obligations; yet, some necessary regulatory space should be left for private standards.