International student mobility has been an important indicator for the degree of internationalisation in higher education. Today, international student mobility has moved from unorganised or self-organised study abroad to a variety of mobility forms organised within programmes. It has also become an issue of economic competitiveness, like attracting best talent, wealth creation and brain drain. This paper focuses on mobility as a limited period of study abroad (typically between six and 12 months) and not on mobility for the purpose of studying a whole degree programme abroad. Meanwhile, it takes ERASMUS program in Germany for example, analyzes the barriers to student mobility and possible solutions, and draws conclusions that widening participation and broadening geographical scope. (Contains 2 tables.) [This paper was presented at the Beijing Forum "The Harmony and Prosperity of Civilizations" in the Subgroup Education "Education and Human Development from the Global Perspective" (Beijing, China, August 23-25, 2004).]