This paper provides the theoretical analysis of forms of solidarity in academia and its relationship to academic integrity. This analysis is inspired by the Guidelines for an Institutional Code of Ethics in Higher Education drawn up by the International Association of Universities and the Magna Charta Observatory. These Guidelines refer to the principle of solidarity in the context of international cooperation between higher education institutions. However, the author of this paper believes that this principle might also be used in a broader academic context, in particular, in the field of academic ethics and academic integrity. Therefore, this paper aims at revealing the relevance of solidarity in academia and argues that the principle of solidarity can be considered as one of fundamental principles of academic ethics and should be reflected in the structure and provisions of the codes of academic ethics (conduct). For this purpose the author explores the philosophical and sociological approaches towards solidarity and defines the concept of academic solidarity, discusses the conceptual connection between academic solidarity, ethics and integrity and illustrates the impact of solidarity on the development of academic integrity. This analysis allows the author of the paper to recommend embedding the principle of solidarity in the codes of academic ethics of higher education institutions as well as extending the scope of its application by linking the rights and responsibilities of different groups within the academic community in a way that best expresses their unity, shared responsibility, mutual support in meeting the standards of social ethos.