Cardiac pacing has been used widely in Korea as the main treatment for bradyarrhythmia. Yet there has been no data about the status of pacemaker implantation in Korea. The present study was done to determine the situation and trend of cardiac implantation in Korea. The information was obtained from the pacemaker manufacturers. The mean age at implant was 62.8 years and the male-to- female ratio was 1:1.43 in 2004. High grade atrioventricular block(49.2%) and sick sinus syndrome(37.3%) were the main indications for permanent pacing. The main pacing mode implanted was DDD. 49.4% of the pacemakers were single chamber pacemakers(VVI,VVIR,VDD,AAI or AAIR) while 50.6% of pacemakers were dual chamber pacemakers(DDD or DDDR) and the number of new implants per million people was 27.2 in 2004. This number is very low compared to that of the advanced countries. Yet the portion of dual chamber pacemakers is as high as that of the advanced countries. There has been a gradual increase in pacemaker implantation from 2000 to 2004(923/year to 1335/year). With an increasing life expectancy, the implantation rate will be expected to increase.