In this conceptual paper we discuss the value of doubt in teacher education for ourselves and, by implication, more broadly. We develop an argument for the value of doubt in teacher education that grows out of the recognition of the complexity of teaching. We interrogate meanings of doubt in this context and debate the value of doubt and certainty. We also indicate the challenges of fostering and nurturing doubt in teaching and teacher education. We suggest that doubt is a necessary element of teacher education as its presence helps to prepare our students for their careers as teachers in a complex and uncertain world. It is also more fundamentally honest than a professed certainty on the part of the teacher educator.