Purpose: This study was conducted to evaluate the effects of education about pressure ulcer classification and incontinence-associated dermatitis on knowledge and self-efficacy in pressure ulcer among nurses. Methods: One group pretest-posttest design was used. Participants were 41 nurses in a tertiary hospital in Seoul. A 90 minutes lecture was delivered. The self-reported-questionnaire on knowledge and self-efficacy and photograph test for knowledge were done at pre- and post-education. Results: After education, there was significant increase in the score of knowledge measured by questionnaire (mean 1.76, p<.001), in the score of knowledge measured by photographs (mean 2.00, p<.001) and in the score of self-efficacy (mean 5.17, p<.001). Conclusion: This study showed that knowledge and self-efficacy in pressure ulcer were improved by the education about pressure ulcer classification and incontinence-associated dermatitis. This program may be used for enhancing nurses’ abilities of caring pressure ulcer.