This research is a correlational research, which aims at finding out the correlation between self assessment and speaking ability. There were two variables used in this research, was variable X (Self Assessment) and variable Y (Speaking Ability). The subject of this research was the eighth grade students at Junior High School 16 Pekanbaru whereas the object of this research was the correlation between self assessment and speaking ability. The population of this research was 197 students. To choose the sample, the researcher used simple random sampling technique and got 40 students as the sample. In collecting the data, the researcher used questionnaire for self assessment and oral test for speaking ability. From the data analysis which had been done by using SPSS 20.0 version, it could be seen that there was a significant correlation between self assessment and speaking ability. It could be shown that the probability of score sig.t is 0.000, smaller than the significant alpha of 0.05 (sig.t < 0.05). It means that H0 is rejected and Ha is accepted. In other words, there is a significant correlation between self assessment and speaking ability.