One of the main issues of internationalisation is networking. The network way of action within higher education institutions (HEIs) represents new modes of the information work. Networks are worth evaluating more precisely in the future, and social network analysis (SNA) is a useful tool for this evaluation. This article describes the network of people working with internationalisation in Finnish universities of applied sciences (UASs). The study combines SNA and knowledge-sharing between HEIs. The model of knowledge creation introduced by Nonaka and Takeuchi is used in the analysis. On this ground of network evaluation, we study the network structure, relations and roles in the internationalisation network and discuss appearance of trust and competition in co-operation between HEIs. (Contains 2 figures and 2 tables.)