Purpose: The purpose of this study was to disclose in-house educational activities on pressure ulcers in larger hospitals and to discuss effective in-house educational activities. Method: In July 2004 we mailed questionnaires on activities to deal with pressure ulcers and in-house education of 2003 to 854 hospitals with more than 400 beds, founding 2003 Japanese hospitals yearbook. Results: We collected questionnaires from 384 hospitals (45%). Then, we analyzed questionnaires from 279 hospitals excluding questionnaires from long-term care institutions. All of those 279 institutions indicated that they did measures to prevent and to treat pressures ulcers for their patients. Methods of in-house education included lectures (74.2%), teaching while making rounds (52%), and conferences to discuss individual patients (25.8%). It was found during a one-year period that lectures were conducted 3.7 times (average), hours of lectures were 16 hours (average), and number of audience ranged 26 (average). Clinical rounds ranged 16.1 times (average). Conferences were held 1-14 times (average 5). Clinical rounds and conferences didn't show relationships with the presence of “Standard of Care” but there was a significant relationship between hospitals with “Standard of Care” with prevention, selection of bedding, and treatment and lecturing (p<0.01). In those hospitals where ET/WOC nurses lectured, the numbers of lectures were 4.7 times and audiences per 100 beds were 30.1, significantly larger (p<0.01) (p<0.05) respectively. Discussion: Even though in-house education was done in all hospitals, there were differences in methods, frequency, and time. Lectures were related to “Standard of Care” and it is thought lectures influence the quality of care more than other methods do. Since ET/WOC nurses lectured more often and more hours than other professionals, it is suggested that ET/WOC nurses' educational activities may influence the quality of care.