One of the fundamental provisions that a hospital requires is the environmental safety through cleanliness. The effective management of atmospheric conditions, i, e. air purity, cleanliness of facilities /furnitures and bed-linen instruments are direct-environment of hospitalized patients. Meeting physical cleanliness needs of patients, application of aseptic technic while carrying out nursing measures and the cleanliness of hospital personnel are another categories of concern. This study was carried out, from March through April 1976, to investigate the degree of satisfaction on cleanliness mat patients perceived, and to compare with that of nurses on their nursing performances. 44 questionaires categorized into 6 major concern were used. For the survey, 269 patients and 191 nurses of 3 general hospitals in Taegu:kyung-puk University Hospital,Presbyterian Mission Hospital, and Catholic Patima Hospital and 116 senior nursing students from Kyung-Puk University and Presbyterian School of Nursing were ran domely sampled. Results are as follows; 1 . Mean satisfaction score on cleanliness revealed to be average on patients, On nursing performance for cleanliness revealed to be average in nursing students and relatively high in graduate nurses. 2. Mean ;score of patients revealed to be significantly lower in comparison with that of nurses' . 3. Mean score of nurses revealed to be significantly higher in comparison with that of nursing students. 4. Mean score of patients revealed to be significantly lower in comparison with nursing students. 5 . Mean satisfaction score of patients in all categories revealed to be the lowest in the rank order. 6. The lowest categorial mean score revealed to be the linen and instrument in all three groups. Recommendations 1. A more satisfactory mean of cleaning (medical asepsis) of mouth thermometers needs to be developed. 2 . Further investigation to clarify the difference between patients and nurses on hospital cleanliness is recommended.