This research was done to promote improvement of practical application of nursing diagnoses and to improve the quality of nursing. The subjects of this research were 156 second year students of C junior nursing college who were giving adult patient care. The nursing diagnoses of 312 reports were analyzed using NANDA. In these case reports only nursing diagnoses were considered, of which there were a total of 982. In the data analysis the 944 of the nursing students' nursing diagnoses matched with 105 NANDA nursing diagnoses. Of these, the most frequent diagnoses were pain(165, 17.48%), anxiety(101, 10.70%), alteration in nutrition(83, 8.79%), sleep disturbance(67, 7.10%), in activity intolerance(67, 7.10%), ineffective breathing pattern(51, 5.40%). The etiology for the students' nursing diagnoses were compared with NANDA's nursing diagnoses by frequency. The most frequent etiology for the nursing diagnoses of pain was a biological etiology(50, 31%), for anxiety, situation crisis(58, 57.43%), for alteration in nutrition, indigesion(23, 27.71%), for sleep disturbance, external etiology (25, 37.32%), for activity intolerance, immobile position (22, 32.84%), for ineffective breathing pattern, pain (35, 68.63%), and for impaired physical mobility, pain (31, 65. 96%). The most frequent etiology for constipation was inadquate digestion of water and cellulose (16, 34. 78%), for fluid volume deficity, loss of body fluid (21, 52.50%), for impaired skin integrity, external etilogy(16, 43.24%), for impaired physical mobilty, pain(22, 62.86%), for knowledge deficits, cognition disturbance(9, 27.27%), for ineffective air way clearance, secretion obstruction (14, 48.27%), for impaired gas exchange, loss of transport ability of blood oxygen (9, 37.50%), and for powerlessness, therapy environment (5, 22.73%). The number of nursing diagnoses by pattern was exchange(16), moving(6), feeling(4), choosing(4), relating(3), communication(1), perceiving(l), kno-wing(l), valuing(l).