Nurses are rarely treated as equals in the social, professional, clinical, and administrative life of healthcare organisations. The primary objective of this study is to explore nurses' perceptions of organisational justice in public healthcare institutions in Majorca, Balearic Islands, Spain, and to analyse the ways in which they exercise their political agency to challenge the institutional order when it fails to reflect their professional ethos. An ethnomethodological approach using critical discourse analysis will be employed. The main participants will be nurses occupying different roles in healthcare organisations, who will be considered central respondents, and physicians and managers, who will be considered peripheral respondents. Data generation techniques include semi-structured interviews, a sociodemographic questionnaire, and the researcher's field diary. This is one of the first studies to address organisational justice in healthcare organisations from a macrostructural perspective and to explore nurses' political agency. The results of this study have the potential to advance knowledge and to ensure that healthcare organisations are fairer for nurses, and, by extension, for the patients in their care.