This study was conducted to assess psychological capital levels of nurses. This descriptive study was carried out with 192 nurses working in a university hospital. The data were collected using Information Form and Psychological Capital Questionnaire PCQ) and assessed in SPSS 18 program. The nurses obtained a mean total score of 4.24 +/- 0.55 from PCQ. Additionally, total scores of nurses who were female, worked in nurse-position and were satisfied with working in the hospital and this profession were higher; which was statistically significant. Also, "psychological resilience" was higher in female nurses and scores of "hope" subscale were higher in female and married nurses for hope subscale; whereas, self-efficacy scores were higher in nurses who had longer professional and service experiences, and were working at the operating room (p<0.05). Nurses and especially female nurses had high psychological capital levels.