Purpose This study aimed to evaluate the risk of acute myocardial infarction (AMI) associated with intravitreal ranibizumab in age-related macular degeneration (AMD). Methods This nationwide retrospective case-crossover study using data from the Korean National Health Insurance Service database included patients diagnosed with exudative AMD using the registration code for exudative AMD (V201) from 2009 to 2014. We identified all incident AMI cases among these exudative AMD cases from inpatient claims and defined the index date as the date of hospitalization. For each patient, we defined the case period as one to 60 days and four control periods as 121 to 180, 181 to 240, 241 to 300, and 301 to 361 days, respectively, before the index date. A prescription of ranibizumab was searched for during the case and control periods. We calculated the adjusted odds ratios and their 95% confidence intervals using a conditional logistic regression model. Results From a cohort of patients with exudative AMD (n = 41,860), a total of 181 AMI patients with exudative AMD were included. Among all the patients, 11.05% were treated during the 2 months preceding the index date as compared with 8.29% to 9.39% treated during control periods. The adjusted odds ratio of AMI associated with intravitreal ranibizumab during the preceding 2 months was 1.22 (95% confidence interval, 0.673–2.213; p = 0.5124). Analyses based on case periods of 15 days and 1 month yielded similar results. Conclusions Intravitreal ranibizumab injection does not appear to increase the risk of hospitalization for AMI within 60 days in exudative AMD patients.