Based on an analysis of the provisions of the legislation, the law enforcement acts of the courts, the  essence of the legal phenomenon of abuse, as well as the problems associated with the application of provisions on abuse of law in the field of labor legal relations, are investigated. Based on examples from judicial practice, the  paper substantiates the absence of a formally defined approach to the application of the principle of inadmissibility  of abuse, as well as its superficial understanding. The paper reveals the issues of theoretical heterogeneity of the  intersectoral concept of abuse of law in domestic science, as well as the understanding of the concept of "abuse"  and its elements existing in the science of labor law. In addition, the possibility of highlighting this type of abuse  as abuse of power (opportunities) is being considered. The expediency of the development of an integrated cross[1] sectoral system of views and legal norms in relation to abuse in law is substantiated, giving answers to questions  about the place of abuse in the system of legal behavior, its means and the system of effective measures of  responsibility.