The use of digital didactic tools at each level of education contributes significantly to the individualization of teaching, to strengthening the interactivity of learning, to making presentations of teaching materials more effective, to stimulating the learning interest of pupils and students and to strengthening their cooperation. The paper deals with evaluation of professional didactic-technological competences of teachers of primary education in Slovakia. The data for this evaluation were obtained on basis of an empirical survey of the extent and manner of the use of selected appropriate digital tools by teachers working at the primary level of education in Slovakia within their pedagogical activities. Results of the empirical survey indicate that teachers working at the primary level of education still prefer Microsoft PowerPoint software application in their pedagogical practice or use different free available educational materials, which they adapt according to their specific educational needs. It is clear, that more progressive newer software applications such as Prezi Present, SMART Notebook/Lumio, or ActivInspire are applied by these teachers in their teaching practice only minimally compared to Microsoft PowerPoint. Moreover, the results of the survey have showed that the teachers assess the level of their digital competences as rather sufficient, or sufficient only in relation to the so-called traditional software applications, such as Microsoft Word, Microsoft Excel, Microsoft PowerPoint, Edu-Page, and in relation to applications aimed at collaborative creation and management of online documents through the cloud platform Google Workspace. For the other applications which were mentioned, they rated their knowledge and digital skills as rather insufficient or not sufficient.