This paper deals with humanitarian non-profit organizations that aim to achieve a certain social interes or to solve a social problem and whose primary goal is not to make a profit. Managing nonprofits is complex becase of the involvement of multiple stakeholders, the reliance on donations, the lack of human and financial resources. Like the profit sector, nonprofits must conduct marketing activities to satisfy their customers and compete in the market. The first part of the theoretical work defines the notions of non-profit organizations and the specificities of humanitarian non-profit organizations. The second part of the theoretical work explain the basic determinants of the marketing of nonprofit organizations and describes the marketing activities that are divides into the stages of analysis, planning, implementation and control. Association Naša dica is used as an example of a case study, so the organization is briefly described as its field of activity and activities it conducts. The marketing activities that the association (not) carries out are described. An analysis of the marketing activities of this association can serve other similar associations as an example of how marketing activities should be conducted and how they can raise the level of business of non-profit organizations to a higher level and more effectively meet the needs and desires of their users. The problems of this work are illustrated by the insufficient use of the association´s marketing activities which use would increase the recognition of the association, the number of members, donors and volunteers, member engagement, financial resources, create an image and raise public awareness of current social problems.