According to an embodiment of the present invention, provided are an antibacterial agent containing carbon family nitrogen-based non-oxide nanoparticles whose average particle diameter is 5-400 nm, and a production method thereof. According to the present invention, it is possible to provide antibacterial agents with outstanding antibacterial effects.본 발명의 일 실시예는 평균 입도가 5 내지 400nm인 탄소족 질소계 비산화물 나노입자를 포함하는 항균제 및 그 제조방법을 제공한다.