Introduction: COVID-19 is an infectious disease caused by novel Corona virus strain and transmitted in community. The present research aimed to find out about the relationships of knowledge and perceptions related to COVID-19 transmission prevention behavior among ticketing workers of a ferry operator. Methods: This research employed quantitative methods with cross-sectional research design and chi-square analysis approach. The research sample consisted of 99 respondents who were ticketing workers of ferry operators within the working area of the Port of Merak, Banten. Results: The research results showed that 30.3% of the respondents had poor and remaining 69.7% had good COVID-19 transmission prevention behavior. As many as 66.7% of the respondents had good knowl- edge, while 42.4 % had constructive perception of COVID-19 transmission prevention behavior. The analysis test showed that there were significant relationships between knowledge and perceptions related to COVID-19 transmis- sion prevention behavior. Managers are suggested to improve workers’ knowledge and perceptions on COVID-19 transmission prevention. Conclusion: Workers with good knowledge were twice as likely to have good COVID-19 transmission prevention behavior.