This qualitative research was aimed to describe the students mathematical discourse in Socratic Scientific learning to facilitate mathematical communication ability. The subject of this research was students of VII H class of SMPN 10 Bandarlampung in academic year of 2016/2017. The qualitative data of this research was about students mathematical discourse which were gotten by observation and interview. Three procedures of data analysis were data reduction, data display, and conclusion verification. Based on the research, it was concluded that in mathematical discourse, there were: (1) mathematical expression and written text as the dominant indicators of mathematical communication ability, (2) clarification as Socratic question that was used by teacher more frequently, and (3) communicating as Scientific phase that was more frequently appeared. Besides that, the research findings were characteristic pattern of mathematical discourse, mathematical discourse form, and the factors that influence students response in mathematical discourse. Penelitian kualitatif ini bertujuan untuk mendeskripsikan percakapan matematis siswa pada Pembelajaran Socrates Saintifik dalam memfasilitasi kemampuan komunikasi matematis. Subjek penelitian ini adalah siswa kelas VII H SMPN 20 Bandarlampung tahun pelajaran 2016/2017. Data penelitian ini merupakan data kualitatif tentang percakapan matematis siswa yang diperoleh melalui catatan lapangan dan wawancara. Analisis data dilakukan melalui tiga tahapan, yaitu reduksi data, penyajian data, dan penarikan kesimpulan. Berdasarkan hasil penelitian, diperoleh kesimpulan bahwa dalam percakapan matematis terdapat: (1) mathematical expression dan written text sebagai indikator kemampuan komunikasi yang dominan muncul, (2) pertanyaan Socrates bertipe klarifikasi yang lebih banyak digunakan guru, dan (3) tahap mengomunikasikan sebagai tahapan Saintifik yang banyak terlihat. Selain itu, diperoleh temuan berupa pola karakteristik percakapan matematis, bentuk percakapan matematis, dan faktor-faktor yang memengaruhi respon siswa dalam percakapan matematis.Kata kunci: kemampuan komunikasi matematis, percakapan matematis, Socrates Saintifik