The number of CIEDs patients, who receive remote monitoring(RM), has been increasing in Japan. There have been few reports of “remote monitoring dropouts” in which remote monitoring has to be discontinued for some reason and patients are forced to switch to conventional outpatient care only. The aim of this study was to clarify the incidence and factors about dropouts of RM and to investigate the predictors of such dropouts. Three hundred thirty-six consecutive patients(age : 77[70, 82] years, male : 52.7%, pacemaker : 69.6%)who received remote monitoring after de novo CIEDs implantation or battery replacement between January 2018 and September 2021 were retrospectively studied. Factors associated with dropout of remote monitoring were analyzed. Of the 336 patients, 28(8.3%)had dropout of remote monitoring. The most common reason was communication failure caused by power supply or installation location(39.3%). The dropout group was significantly older(83[74, 88]vs. 76[70, 81], p=0.001), and had a higher proportion of women(71.4% vs. 45.1%, p=0.013)and replacement cases(46.4% vs. 18.8%, p=0.001)than the continuation group. Multivariate logistic regression analysis showed that age(Odds ratio : 1.04, 95% confidence interval : 1.00-1.09, p=0.044)and replacement case(Odds ratio : 3.73, 95% confidence interval : 1.64-8.44, p=0.002)were independently associated with dropout of remote monitoring. In CIEDs patients, elderly patients and replacement cases may pose a higher risk of dropout of remote monitoring.