The Human Genome Project and the related research and development activities have raised heated discussions around some very basic ethical and social issues. A much debated concern is that of justice in human genetic research and in possible applications, especially pertaining to questions of just benefit-sharing - who and based on what sort of argumentation has the right to require benefits arising from research and discoveries, and what can even be considered as benefits? In what follows I will be examining and clarifying the notion of benefit-sharing by focusing on its justifications. I will argue for certain qualifications and limitations in using this concept in specific and universal contexts.