The importance of competence assessment in anaesthesia nursing education has increased since nurse educators and anaesthesia care employers have identified the gap between nursing education and nursing practice. In order to ensure nursing students' preparedness for entry into anaesthesia nursing practice, it is necessary to measure whether nursing students have achieved the required competence to practice as anaesthesia care providers.To assess the anaesthesia nursing competence of nursing students and to describe factors related to their anaesthesia nursing competence. This study will provide new knowledge to support the curricula of nursing education and new nurses' practice in anaesthesia care.Cross-sectional survey design.Data from a sample of Finnish nursing students (n = 205) were collected by using an on-line/paper and pencil survey (the Anaesthesia Nursing Competence Scale, 7 categories) in 2017. The assessment was based on self-assessment and used a Visual Analogue Scale (0-100). Descriptive statistics, a Pearson correlation coefficient, independent sample t-tests and a multivariable regression were used to analyse the data.The self-assessed overall competence of graduating nursing students was 59 (range 43-73). Approximately half of the students reached an acceptable level (60≤) and half did not. The highest self-assessed category was collaboration within patient care, and the lowest was knowledge of anaesthesia patient care. The number of credits, anaesthesia courses, and experience of clinical practice in anaesthesia nursing were significantly related to anaesthesia nursing competence.Competence development in the knowledge of anaesthesia patient care should be considered in general nursing education. Student nurses' competence could be developed by providing more opportunities for theoretical studies and clinical practice in anaesthesia nursing. A specialised post-registration education in anaesthesia nursing might be one solution to overcome the limitations in the competence that general nursing education is not fully able to cover for anaesthesia nursing.