The article explores the concept of openness in EU law, focusing on transparency, participation, and democracy. It clarifies the difference between openness and transparency and examines how the EU aims to promote good governance and involve civil society in decision-making. The research suggests that openness is evolving from simply providing access to information to actively engaging the public and creating new ways for people to participate in EU processes. This shift towards more active participation is expected to enhance democracy and political legitimacy within the Union.