Academic works produced by university members are valuable resources that should be managed properly. The development of Institutional repositories (IRs) was purposed to preserve and disseminated these resources so that benefit to the university in enhancing university scholarship and performances.. However, the existing of repository system is less used. It is alleged that lecturers are not aware and reluctant due to the lack of their motivation. User expectancy is regarded as motivational factor that lead invidual to use insitutitional repositories. The purpose of this paper is to examine the relationship between user expectancy and the use of institutional repositories in higher education institutions in Indonesia. A study is conducted with 50 university lecturers at Syarif Hidayatullah Jakarta. Structural Equation Modelling Partial Least Square (PLS-SEM) is used for data analysis. SmartPLs 2.0 software is employed in the analysis. The result indicated that since the measuring instruments are valid and reliable, user expectancy have influence to the use of IRs. Based on the structural model, it was found that user expectancy contributes to the use of IRs up to 57,6 %.