ObjectivesNursing care is one of the most important tasks of nursing. Providing safe and high-quality nursing care will improve the patient as soon as possible and reduces the complications of the disease. Due to the corona epidemic in the last year, nurses cannot provide all the necessary care for patients; a series of care is eliminated or delayed or reduced, which is called missed nursing care. So, this study aimed to investigate the missed nursing care and the reasons affecting it in the corona wards in Ardabil.Study designThe research is conducted in a cross-sectional manner. The research included 135 nurses who worked in Ardabil's corona wards.Data collection/extraction methodsThe Missed Nursing Care Questionnaire, was used to collect data. The significance level of statistical tests set at 0.05.Principal findingsMost of whom were women, 135 nurses participated in the study and had a bachelor's degree in nursing. Supportive and necessary care is missed more than other care; According to nurses, the most common reasons for the missed care were emergencies, low staffing, and an increase in the number of patients.ConclusionsAs a result of the findings, being in a fresh and uncertain situation, as well as an increase in the number of patients, has resulted in a loss of nursing care. By controlling these factors, the missed care in the ward can be controlled, and increase the satisfaction of patients and nurses.