Purpose: This study was conducted to examine the effects of a fall prevention education on the fall-related knowledge, prevention activity of the elderly hospitalized in internal medicine department. Methods: A nonequivalent control group pretest-posttest design was used for this study. A total of 44 patients of the elderly hospitalized in internal medicine department were randomly divided into the experimental group (n=22) and the control group (n=22). The experimental group received about an half hour, fall prevention education at the admission day, 3days and 5days after admission, while the control group received the usual care. The outcome variables were measured before and after fall prevention education. Data were analyzed with $x^2$-test and t-test by using SPSS 12. Results: The experimental group showed significant improvement in fall-related knowledge and prevention activity. Conclusion: The fall prevention education was effective in increasing fall-related knowledge and prevention activity of the elderly hospitalized in internal medicine department. For reducing fall events, it is important to educate the elderly hospitalized about fall-related knowledge and prevention activity related to fall.