This article attempts to clarify the concept of disability by explaining the ways in which it has been applied, and defined, by both philosophers and disability scholars. Conceptual approaches to disability can be divided into two main categories: the individualistic and the social approaches. In the individualistic framework, disability is seen as an individual condition that results in a disadvantaged position regarding civic, economic, and personal flourishing. This is the dominant view of disability in bioethics. According to the social approaches, disability is seen as a result of the oppressive material arrangements in existing societies, or as a corollary of the prevailing cultural values, ideas, attitudes, and language that produce and shape human reality. I argue that disability is essentially a normative concept that reflects the idea of what kind of beings humans ought to be, or, how society ought to be constructed to treat its members equally. In other words, the essential core of the concept of disability is ethical, and this implies that ethical examination is needed to provide a fuller picture of disability as a physical, psychological, and social phenomenon.Thanks to Matti Häyry, Tuija Takala, and Tanja Vehkakoski for their useful comments. This paper was produced as a part of the project Genes, Information, and Business, financed in 2000–2003 by the Academy of Finland.