This study was carried out in clinical nurses to identify the factors related to implementation of pain intervention. Samples were selected from 215 nurses working at four different hospitals in Seoul, Taegue, Andong and Mungung between March 3 and April 4, 1997. The data were analyzed with descriptive statistics, t-test and chi-square using SAS statistical package. The results were as follows. 1. The answer of questions. Ninety six percent of the nurses agreed that pain perceived in each patients was influenced by several factors besides tissue demage. Fifty two percent of nurses demonstrated that they were more responsible for relieving patients's pain now than just after graduation. Ninety two percent of the nurses answered that they were not as sympathetic as for patients's pain now than just after graduation. Eighty five percent of the nurses thought that patients' pain score would be higher than nurses. At the moment of pain assessment, 34.4% of the nurses thought the most important factor was physiological change. The most applicated pain intervention method was analgesic medication. They thought that interesting pain intervention method were change of interest, psycotherapy, hypnotherapy, music therapy, relaxation technique, gi therapy, exercise therapy, supporting therapy, hot application and cold application. They thought that new pain intervention methods were gi therapy, hypnotherapy, imagenation therapy, music therapy and relaxation technique. Only seventeen percent of the nurses had practiced new pain intervention method to the patient. 2. The relation among characteristics, the level of assertiveness behavior, self-esteem and implementation of pain intervention. Source, graguation, responsibility for pain relief and the level of assertiveness behavior were related to implementation of pain intervention method and showed a statistically significant difference.