Pronunciation is the sound of production words used by someone to communicate creates, and conveys meaning with others. It is useful for the listeners to understand a suitable flow in communication. However, when the researcher had done observation at the eighth grade of SMP Negeri 7 Kotabumi, the researcher found that some of the students have low ability in speaking ability. The purpose of this research is to investigate whether there is significant correlation between students' pronunciation mastery and their speaking ability of the eighth grade in SMP N 7 Kotabumi academic year 2021/2022. The population in this research was eight classes of the eighth grade in SMPN 07 Kotabumi which consist of 256 students. The instrument used to collect the data of pronunciation mastery and speaking ability were an oral test. After collected data, it was analyzed by pearson product moment, and the results of statistical data analysis of this research was r_observed > r_table (32) (0.05) or 0,923 > 0,349, and t_observed is greater than t_{table (32-2) (0.05)} or 13.108> 1.694, this indicate that there is significant correlation between students' pronunciation mastery and their speaking ability of the eighth grade in SMP N 7 Kotabumi academic year 2021/2022.