The master's thesis deals with the questions asked by users in Grosuplje City Library and Ljubljana City Library (Unit Bežigrad). In order to determine what share do the reference questions represent and what is the share of informative questions I used a written questionnaire for users, an interview for employed reference librarians and a worksheet for observing reference discussions. The implementation of the research, using these three methods, was held in autumn 2016. The research includes 200 surveyed users in both libraries, 10 interviewed librarians and 100 reference interviews. The results showed that in both libraries the reference questions represent 65 % share, whereas informative questions represent 35 %. Among reference questions there is biggest share of bibliographic and smallest share of factographic questions.