Online game addiction is a situation where playing games provide satisfaction and pleasure. There is a feeling to keep repeating playing games. Also, much time is spent playing games so that the individual cannot control it. Religious behavior is someone's activity that occurs when performing worship or rituals such as prayer, fasting, and others. This study aims to determine whether or not the influence of mobile legends online game addiction on religious behavior in the Yogyakarta Mobile Legends Community. This study uses a quantitative approach. The sample of this study amounted to 30 respondents representing 25% of the 120 members of the Yogyakarta Mobile Legends Community. The results of hypothesis testing using a simple linear regression test indicate that there is an influence of online mobile legends addiction to religious behavior in the Yogyakarta Mobile Legends Community. This is indicated by the results of a significance value of 0.005 which is smaller than 0.05. Thus, the addiction variable for online game mobile legends influences the variable religious behavior.