This study analyzes the comparison between before and after of education in information finders of Automated External Defibrillator (AED) within 6 months and the influence upon self-confidence in undergraduates. Thus, the aim is to be conducive to arranging regular educational program in order to be continuously maintained the proper usage of AED and the information on AED. This study targeted 43 university undergraduates from May 21, 2009 to May 22. The analytical method was analyzed by using SPSS WIN 12.0 Version program. Statistical significance was set to p<0.05. Results are as follows; As for difference in knowledge, attitude, self-confidence, and skill performance accuracy before and after education, the knowledge increased by 0.16 points from 4.61 points before education to 4.77 points after education (p<0.05). Attitude increased by 0.36 points from 4.17 points before education to 4.53 points after education (p<0.001). Selfconfidence increased by 0.24 points from 3.93 points before education to 4.17 points after education (p<0.05). Skill performance accuracy increased by 1.51 points from 2.15 points before education to 3.66 points after education (p<0.001). In the results that AED, knowledge, attitude, and skill performance accuracy have influence upon self-confidence, the attitude toward AED (b=0.530, t=3.834) before education showed significant influence upon self-confidence (p<0.001). The attitude toward AED (b=0.734, t=5.949) even after education was indicated to have significant influence upon self-confidence (p<0.001).