Clinical tests done in a short and limited time have raised questions regarding the validity of COVID-19 vaccination efforts. This study aims to determine the level of COVID-19 vaccine acceptance and the main indicator of COVID-19 vaccine acceptance among citizens of Melaka Tengah, a highly dense and most developed area in Melaka, Malaysia. A quantitative crosssectional survey is employed using purposive non-probability sampling techniques. A fourpoint scale questionnaire was administered online. A total of 411 vaccinated adults aged 18 or older responded to the survey, with 68.4% being government servants and 60.1% having a household income of less than RM5,110. Data analysis was performed using Statistical Packages for Social Sciences (SPSS) version 26. The findings showed that the level of COVID-19 vaccine acceptance among citizens of Melaka Tengah was moderate (M=2.92). The main indicator (M = 3.01) and part of the population's behaviour was self-efficacy. Hence, more efforts are needed to increase self-efficacy to enhance the acceptance of the COVID-19 vaccination as compared to perceived benefits and cues to action that have low predictive power.