The Territorial Agenda 2030, adopted in December 2020, introduces a new policy frame: that of ‘A Just Europe’. This intergovernmental policy document is intended to guide territorial cohesion policy and strategic spatial planning in and across the EU member states. But what does the adjective ‘just’ mean and to what extent can it become operational? Drawing on text analysis and expert interviews, the paper investigates the rationales and expectations underpinning this policy frame. It firstly contextualizes the policy frame of ‘a Just Europe’ within the policy and academic debates on spatial justice and territorial cohesion, and positions the Territorial Agenda 2030 against the backdrop of its forerunners. The analysis demonstrates that instead of guiding measures, the Territorial Agenda 2030, like its forerunners, essentially has a diagnostic and to some extent also a motivational function to mobilize policy actions. We do however identify and discuss three rather novel conditions which, unlike those of its forerunners, may revitalize the European spatial planning discourse. This contribution demonstrates that spatial justice is an inspiring notion to critically reflect on the current and future character and potentials of European spatial planning in general and territorial cohesion policy in particular.