Decubitus is a damage to the skin or deeper layers caused by long – term pressure on the skin and tissues when a person stays in one position for a long time. Weak circulation makes some patients more sensitive to decubitus, but cognitive impairment can also make it difficult to apply prophylactic measures. The aim of the research is to find out how much the students of the Extraorinary Professional Study of Nursing know in general about pressure ulcers, stages, prevention and treatment of pressure ulcers. Respondents are female and male persons aged between 20 and 45, first and third year part-time students of the Extraordinary Profesional Study of nursing in Karlovac, a total of 46 respondents. The sample was collected by sending a questionnaire in the formo f Google Forms to Viber groups of respondents. Statistical tests, t-tests for independent samples were applied, Chi square test, Pearson correlation test. In conclusion, 1st year students on average correctly answered 21.57 questions of the entire knowledge test about pressure ulcers, while 3rd year students answered 21.31 questions correctly. The 3rd hypothesis was confirmed : Students of the first and third year of the Extraordinary professional study of Nursing have the same knowledge about the risks for the occurrence of pressure ulcers. 1. Hypothesis : Students of the third year of the Extraordinary professional study of Nursing in Karlovac have a more knowledge about pressure ulcers compared to students of the first year, 2. Hypothesis : Students of the Extraodinary professional study of Nursing in Karlovac with more experience also have more knowledge about pressure ulcers and 4. Hypothesis : Students of the third year of the Extraordinary Professional study of Nursing in Karlovac have more knowledge about the first interventions when changes in skin color appear, were rejected. Students of the Extraordinary Professional Study in Nursing have the same knowledge about pressure ulcers.