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The purpose of this study is to determine the direct and indirect effects between the variables of mathematical communication skills and the ability to understand mathematical concepts. The research method uses the path analysis method. The population is grade IX students of Bengkulu City Public Middle School in the Even Semester 2018/2019 Academic Year, amounting to 587 respondents from the high, medium and low school categories. Sampling was carried out with proportional stratified random sampling, totaling 232 respondents. Likert scale instruments are used in data collection. Data were analyzed using path analysis techniques. The results of the study with a significance level of 5%, showed that there was a significant positive direct effect between mathematical communication skills (〖βyx〗_3=0,224) on the ability to understand students concepts.