The Lending Department for adults is located on the first floor on the left and is intended to high school and university students and other adults. Thematic exhibitions of book covers, art works, postcards, photographs and children's works are often displayed in the corridor.

The Adult Department in free access offers an abundant selection of fiction (novels, poetry, plays etc.) from Croatian and foreign literature and foreign books in English, German, Italian, French and other languages, professional, scientific and popular science books in humanities, social, political, natural, techincal sciences as well as applied sciences and arts. Here you can borrow books of all genres such as science fiction, memoirs, bigraphies, travel-books, school reading… The members are regularly informed about new titles in the Library through a Bulletin of New Books, display boards or media. Newspapers and Magazines Reading-room.

The Reading-room is located at the Adult Department with 20 seats and is intended to all library members. Old issues of weekly and monthly magazines, reviews, periodicals, newspapers (Jutarnji lidt, Večernji list, and Vjesnik) are kept for reference 6 months backwards. The Library is subscribed to about 40 items of daily, weekly, monthly press and professional journals.