Breastfeeding is the process by which the child gets everything it needs for healthy growth and development. The World Health Organization and UNICEF recommend exclusive breastfeeding for the first 6 months of a child's life, and continued breastfeeding with complementary feeding for up to two years or longer if the mother and child so desire. The aim of this research was to examine the attitudes of mothers of preschool children about the duration of breastfeeding. 129 mothers of preschool children attending one preschool in Zadar County participated in the research. An online survey collected data on the sociodemographic characteristics of the respondents, data on breastfeeding and mothers' attitudes about breastfeeding, for which the Behavior, Attitudes and Knowledge Questionnaire for Parents (BBAKQ) was used. The results showed that the majority of respondents had positive attitudes about breastfeeding. Mothers achieved an average score of 4.26 on the BBAKQ attitude scale. Forty-three percent of respondents believed that a child should be breastfed from 12 to 24 months, and 11% believed that it should be breastfed for longer than 24 months. Forty-seven percent of the respondents breastfed their current child for 12 months or more. Family members supported breastfeeding for longer than 12 months, and the wives/partners of the respondents in a higher percentage than the mothers and friends of the respondents. The age of the mother, the number of children, as well as whether the husband/partner supports breastfeeding for longer than 12 months were not statistically significantly related to the respondents' attitudes about the duration of breastfeeding.