Nonprofit organizations are a corporation or an association that conducts business for the benefit of the general public without a profit motive. The success of nonprofit organizations depends on the marketing performance they are implementing. Nonprofit marketing is defined as the application of marketing concepts and management to nonprofit organisations used for improving planning, execution, distribution and communication activity of organization without a profit motiv. Targeted groups towards which nonprofit organization aim marketing activities are users, donors, mediator, volunteers and employees. The most important target group are donors because they provide the necessary resources for nonprofit organizations. Purpose of the work was to study influence of marketing activities of nonprofit organizations on donors motivation and marketing activities of nonprofit organization are case for support, promotion and relationship marketing. A total of 161 existing and potential donors responded to the survey. Results of research showed that case for support doesn't have positive influence on donors motivation, but promotion and relationship marketing have positive influence on donors motivation. Future research would benefit from the use of a larger sample of donors.