An important aspect that students must possess is good self-efficacy and self-esteem. Several indicators that support achieving these goals are found in self-efficacy and self-esteem to gain students' mathematical communication. The main objective of this research is to determine whether the mathematical communication ability of class VIII students of SMP Negeri 4 Buton Tengah can be jointly affected by self-efficacy and self-esteem. This research is ex post facto research with a quantitative approach. The population in this study were all class VIII SMP Negeri 4 Buton Tengah, with a total of 149 students with a total sample of 30 students obtained using the proportional random sampling technique-data collection techniques using questionnaires and tests. Data analysis used inferential analysis using F-test and t-test. The results of this study are as follows : (1) The mathematical communication ability of class VIII students of SMP Negeri 4 Buton Tengah is significantly affected by self-efficacy and self-esteem with F_count=5,625< 3,34=F_tab ; (2) Mathematical communication ability are not significantly affected by self-efficacy with t_count=0,296> 2,052=t_tab; (3) Mathematical communication ability is significantly affected by self-esteem witht_count=31,82< 2,052=t_tab.