This study examined the relationship between prospective teachers' concerns about their teaching and their beliefs about their sense of efficacy. Three hundred and thirty-nine prospective teachers participated in this study. Two instruments, the 'Teaching Concerns Checklist' and the 'Teachers' Sense of Efficacy Beliefs Scale', were used to elicit the participants' teaching concerns and their sense of efficacy. Canonical correlation analysis, conducted to explore the relationships between these two constructs, revealed that concern variables were negatively correlated with efficacy variables. This means that if teachers believe their efficacy is weaker, they tend to have more concerns about teaching. The results of this study have implications for teacher education programmes.