Article aims to analyse impact of project activities called International Business Weeks (IBW) on outgoing student mobilities at the College of Polytechnics Jihlava. The IBW network was established by University Paris 13 in France and Leuven University College in Belgium (now University College Leuven-Limbourg) 17 years ago to encourage finance/business students to apply for international mobility. The network of European business colleges/universities now contains 15 universities or colleges, College of Polytechnics in Jihlava (CPJ) joined it in 2008. The main goal of the paper is to evaluate the effect of IBW on Erasmus mobility at CPJ. Analysis of the data from CPJ information system shows that this impact has weakened gradually. The data also proved that the interest in IBW among CPJ students is stagnating. Partial goal of the article is to suggest solutions for the projects' revitalization. One of the conclusions is that there is a need for qualitative research among the students about their motivations and obstacles of international mobility, with focus on the psychological profile of the students.