In modern elite theory accommodation and compromise between national elite groups are seen as preconditions for the continuance and stability of a democratic society. It is claimed that elite accommodation is facilitated to the extent that the elites are integrated. In this article trust between the various elite groups and their respective institutions is investigated as a core aspect of elite integration. The analyses presented in the article demonstrate that in general there is a relatively high level of institutional trust among national elite groups in Norway. There is, however, some variation in how much trust the various elite groups accord the institutions to which other elite groups belong, and this is explained by (1) the extent to which one elite identifies with the functions of other elites, (2) has a similar ideological orientation, and (3) has social contact with members of other elites.