The aim of this study is to explain the existence of significant differences in abnormal returns before and after the dividend announcement. This study uses an event study approach. The research locations used are companies that announce their dividends on the IDX for the 2016-2020 period. a sample of issuers from all sectors with representatives of 5 issuers from 9 existing sectors who announced their dividends at the time the event occurred. The analytical technique used in this study is the paired sample t test. Based on the results of the discussion in the previous chapter, the conclusion in this study is that there is a significant difference between abnormal returns before and after dividend announcements.