This article discusses the role of soft law in advancing the rights of persons with disabilities in the European Union (EU). In doing so, it revisits the emergence of the standalone, yet cross-cutting, field of ‘EU disability law’ through the lens of the ‘hybridity theory’ advanced inter alia by Trubek and Trubek. Being speculative in nature, this article construes EU disability law as a fruitful area for an enquiry into the dynamic relationship between hard and soft law. Until the entry into force of the Treaty of Amsterdam, soft law was crucial to attract disability within the sphere of action of the EU and to embed the social model of disability, displaying a value-setting role. In the post-Amsterdam period, soft law and hard law coexisted, being complementary to one another. Both contributed to a common objective, namely that of advancing equality of opportunities for persons with disabilities. After the conclusion of the UN Convention on the Rights of Persons with Disabilities, the dynamic relationship between hard and soft law has become more complex and akin to what Trubek and Trubek define as ‘transformation’.