This paper contains three parts. In the first part, what it means to be bilingual in sign language and the spoken (majority) language is explained, and similarities as well as differences with hearing bilinguals are discussed. The second part examines the biculturalism of deaf people. Like hearing biculturals, they take part, to varying degrees, in the life of two worlds (the deaf world and the hearing world), they adapt their attitudes, behaviors, and languages to both worlds, and they combine and blend aspects of the two. The decisional process they go through in choosing a cultural identity is discussed and the difficulties met by some groups are examined. The third part begins with a discussion of why early bilingualism is crucial for the development of deaf children. The reasons that bilingualism and biculturalism have not normally had the favor of those involved in nurturing and educating deaf children are then discussed. They are of two kinds: misunderstandings concerning bilingualism and sign language; and the lack of acceptance of certain realities by many professionals in deafness, most notably members of the medical world. The article ends with a discussion of the role of the two languages in the development of deaf children. (Contains 2 figures and 2 notes.)