The purpose of this study was to examine the effect of teachers' musical and teaching confidence level on their resilience, targeting music teachers (n=242) in middle and high schools across the country. To this end, this study conducted a simple random sampling of middle and high schools nationwide to select 360 schools based on the 2022 statistics service of the Ministry of Education in Korea. Among the teachers working at the 360 schools, confidence in musical ability and teaching ability and teacher resilience were measured for music teachers who voluntarily participated in the online survey. The results of this study are as follows. First, there was a strong correlation between music teachers' teaching and musical confidence level (r=.63). Second, it was found that resilience increased when music teachers had a strong identity as educators (t=-2.27, p>0.5). Third, it was found that music teachers' confidence in teaching ability and musical ability had a significant effect on teachers' resilience (F (2, 239) = 47.76, p<.01).