This research is motivated by the reading aloud method which is not optimal so that the vocabulary mastery ability of the beginner class students PP. Darul Lughah Wal Karomah Probolinggo is still relatively low. This study aims to determine the effect of the Reading Aloud method on the English vocabulary mastery ability for beginer class students at PP. Darul Lughah Wal Karomah, Probolinggo. This research is an experimental research in the form of pre-experimental using the One Group Pretest Posttest Design which only has one group of subjects with two observation conditions carried out without a comparison group and given treatment using the reading aloud method. The variables in this study consisted of the independent variable, namely the reading aloud method and the dependent variable, namely the ability to master vocabulary in learning English vocabulary in beginner class at PP. Darul Lughah Wal Karomah, Probolinggo. The population in this study is beginner class at PP. Darul Lughah Wal Karomah, Probolinggo and the sample is the beginner class, which consists of 21 students. The data analysis technique used the t-test to test the effect of the Reading Aloud method on the ability to master English vocabulary. The results of this study indicate that the calculation of the Pre-test learning outcomes, namely the results achieved by an average value of 59 with a completeness percentage of 0% and the Post-test learning outcomes, namely the results achieved by an average of 75 with a completeness percentage of 11%, This proves that the use of the Reading Aloud Method can improve the ability to master English vocabulary. Keywords: Reading, Reading Aloud, Vocabulary