Tujuan penelitian ini adalah untuk mengetahui peran simple code dalam koreksi kesalahan berbahasa peserta Darmasiswa di Universitas Muhammadiyah Surabaya tahun ajaran 2011/2012. Penelitian ini menggunakan metode kualitatif. Penelitian ini dilaksanakan di kelas Darmasiswa Program Studi Pendidikan Bahasa dan Sastra Indonesia Fakultas Keguruan dan Ilmu Pendidikan Universitas Muhammadiyah Surabaya mulai November 2011 sampai April 2012. Sumber data penelitian ini adalah bentuk ujaran yang dihasilkan oleh dosen, penutur, dan peserta Darmasiswa. Instrumen pengumpulan data dilakukan dengan cara pengamatan, wawancara, dan dokumentasi. Instrumen penelitian ini adalah peneliti sendiri. Analisis data menggunakan metode padan intralingual. Hasil penelitian ini adalah sebagai berikut. (1) Peran bahasa dosen (teacher-talk) memberikan koreksi kesalahan berbahasa Indonesia peserta Darmasiswa dalam hal kesalahan fonologis, sintaksis, leksikon, dan morfologis. Jenis koreksi berupa pengulangan, mengubah, koreksi eksplisit, pancingan, dan klarifikasi. (2) Peran bahasa penutur (foreigner-talk) memberikan koreksi kesalahan berbahasa Indonesia peserta Darmasiswa dalam hal kesalahan fonologis, sintaksis, dan leksikon. Jenis koreksi berupa pengulangan, mengubah, dan koreksi eksplisit. (3) Peran bahasa-antara (interlanguage-talk) memberikan koreksi kesalahan berbahasa Indonesia dalam hal kesalahan fonologis dan kesalahan leksikon. Jenis koreksi berupa koreksi diri dan koreksi teman. _____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ THE ROLE OF THE SIMPLE CODE IN THE CORRECTION OF LANGUAGE MISTAKES MADE BY THE DARMASISWA PARTICIPANTS IN THE MUHAMMADIYAH UNIVERSITY OF SURABAYA Abstract This study aims to find out the role of the simple code in the correction of language mistakes made by the Darmasiswa participants in the Muhammadiyah University of Surabaya in the academic year of 2011/2012. This study employed the qualitative method. It was conducted in the Darmasiswa class of the Study Program of the Indonesian Language and Literature, the Faculty of Teacher Training and Educational Sciences, the Muhammadiyah University of Surabaya from November 2011 to April 2012. The data sources in this study were the forms of utterances by lecturers, speakers, and Darmasiswa participants. The data were collected through observations, interviews, and documenta-tion. The research instrument was the researcher himself. The data were analyzed using the intra-lingual correspondence method. The results of the study are as follows. (1) The role of the teacher-talk in the correction of the Indonesian language mistakes made by the Darmasiswa participants is in pho-nology, syntax, lexicon, and morphology. The types of the correction include repetition, modification, explicit correction, stimulation, and clarification. (2) The role of the foreigner-talk in the correction of the Indonesian language mistakes made by the Darmasiswa participants is in phonology, syntax, and lexicon. The types of the correction include repetition, modification, and explicit correction. (3) The role of the interlanguage-talk in the correction of the Indonesian language mistakes is in phonology and lexicon. The types of the correction include self-correction and peer-correction. Keywords: role of the simple code, correction of language mistakes, darmasiswa.