Purpose: The purpose of this study was to identify the effects of pain management education on knowledge, concern, and attitude about pain management for cancer patients receiving chemotherapy in outpatient settings. Methods: This study used a nonequivalent control group pre-post test design. Data collection was conducted from June to September 2012. The participants of this study were 56 patients (Experimental group; 28, Control group; 28) at one University Hospital in D city. The data were analysed with a SPSS/WIN program. Results: There was a significant difference on knowledge about pain management (t= 2.139, p= .037), but there were no difference on concern (t= -1.355, p= .181) and attitude (F= 3.276, p= .076) about pain management between experimental group and control group. Conclusion: The pain management education had positive effects on knowledge about pain management for cancer patients receiving chemotherapy in outpatient settings. Therefore, to validate the effectiveness of pain management education, customized program and further research should be considered focusing on demographic and disease-specific characteristics.