Abstract. Parents and teachers have not known much that actually behavior of naughty children in elementary school is included violence behavior or known as bullying. Prevalence of the violence behavior which has happened, lack of attention and professional handling for violence behavior in elementary school were important reason to do this study purposely for: (1) indentifying who bullies, who gets bullied, and the content of the violence behavior; (2) explaining the differentiation of violence behavior beetwen two of gender student and beetwen higher class and lower class of elementary school student; (3) finding the risk factors are strong predictors of school environment violence; and (4) how does the teacher intervention to stop bullying. This research was worked by mixed method with explanatory design (quantitative → qualitative) and took 142 students as sample were gotten by using cluster sampling technique. Research finding showed as many as 62. 761% students have ever acted violence behavior and there were difference violence act beetwen both of gender students (P value 0.930 > 0.05) and also difference violence beetwen high class and lower class students (P value 0.930 > 0.05). The risk factors of violence behavior at elementary school student were not merely family and school factor, but psychological factor also.Keywords: bullying in elementary school, intervention of bullying, violence behavior.Abstrak. Orang tua dan guru belum banyak menyadari bahwa "perilaku nakal" anak usia sekolah dasar sebenarnya juga merupakan perilaku perundungan. Melihat hal tersebut masih terjadi dan kurang mendapatkan perhatian atau penanganan serius terhadap perilaku kekerasan di sekolah dasar, maka penelitian ini dilakukan untuk mengidentifikasi pelaku, korban, dan bentuk kekerasan, menjelaskan perbedaan perilaku kekerasan antara siswa laki-laki dan siswa perempuan; antara siswa kelas rendah dan siswa kelas tinggi; menemukan faktor penyebabnya; dan bagaimana peran guru secara preventif dan kuratif terhadap perilaku kekerasan. Penelitian dilakukan dengan desain mixed-method berurutan (kuantitatif→kualitatif), jumlah sampel 142 siswa yang didapatkan dengan cluster sampling. Hasil penelitian menunjukkan bahwa sebanyak 62.761% siswa pernah melakukan tindak kekerasan dan terdapat perbedaan perilaku kekerasan antara siswa kelas rendah dengan siswa kelas tinggi (P value 0.930 > 0.05), juga perbedaan antara siswa laki-laki dengan siswa perempuan (P value 0.930 > 0.05). Faktor penyebab perilaku kekerasan bukan hanya keluarga dan lingkungan sekolah, namun juga diri sendiri, di mana para guru sudah melakukan upaya preventif dan kuratif terhadap perundungan berbasis nuansa sekolah.Kata kunci: perundungan di sekolah dasar, penanganan perundungan, perilaku kekerasan.