Sackett et al. define evidence-based practice (EBP) as the conscientious use of current best evidence in making decisions about the care of individual patients. Evidence-based practice in nursing has not yet been fully established in Croatia, so there are many unknowns regarding the beliefs, as well as many other factors that affect the level EBP application in clinical practice. Positive beliefs and recognition of the value of EBP is assumed to result in its greater application. The cross-sectional study “Evidence based practice - beliefs and implementation” was conducted online using Google Forms. A total of 207 nurses participated in the research, and their answers were collected from between June 21 and June 27, 2020. The questions were divided into 3 categories: (1) general demographic data; (2) the EBP implementation scale and (3) and the EBP belief scale. The results of the research imply that nurses have positive attitudes regarding EBP, but apply it to a lesser extent. The research showed that the frequency of EBP application is influenced by the level of formal education, training (workshops, seminars) and the workplace of the respondents. The lowest frequency of implementation was recorded in respondents with secondary education, and the highest in those with higher education (Master's degree); furthermore, respondents without any EBP training in the last 12 months (seminars, workshops) had the lowest frequency of EBP implementation, while the highest frequency was in those with the most training in the last 12 months. The lowest frequency of EBP implementation was recorded among nurses with only a secondary degree of education, and the highest among head nurses. Respondents of different sex, age, length of employment do not differ significantly with respect to the frequency of EBP use. This research has shown that EBP beliefs are influenced by the level of education, age and the workplace. Respondents with only a completed secondary degree education were the least likely to accept EBP attitudes, acceptance grew with the level of education and was the highest among nurses with a Master's degree. The younger respondents accepted beliefs the least, and the older respondents accepted them the most. The lowest acceptance of attitudes was recorded among nurses with only a secondary degree of education. Respondents do not differ significantly with regard to gender, work experience and the number of trainings (seminars, workshops) with regard to the acceptance of EBP attitudes. The study also confirmed that there is a statistically significant correlation between the frequency of EBP implementation and the participants’ beliefs about EBP. Reliability in researching the scales used is great. A reliability analysis of the two scales was performed, and the reliability coefficient α for claims related to EBP implementation was 0.97, while the reliability coefficient α for claims related to EBP beliefs was 0.91. In conclusion, the reliability of the here used scales is high.