In a context where cultural difference is for many a source of apprehension, often leading to discrimination against minority groups, culture and cultural rights are particularly important for Indigenous peoples. However, compared with the promotion and protection of other human rights, the marginalization of cultural rights is readily apparent. This article explores one of the sources of this marginalization by asking the following question: to what extent does the concept of culture within the field of international law influence the promotion and protection of cultural rights of minority groups? The author claims that ambiguity around the notion of culture and the absence of a binding definition in the international human rights field yield a reductionist conception of culture. By failing to do justice to minority cultural rights, this conception impacts the realization of those rights and exacerbates certain exclusions. A re-conceptualization of the notion of culture, one that accounts for anthropological ideas and concepts, is therefore needed.