This chapter focuses on the governing work of Swedish school inspectors with regards to the role and function of knowledge. As professionals, inspectors are situated as relays and brokers of policy standing in contact with both the political arena and practice arenas. School inspectors use and produce knowledge and they rely on, search for, accumulate and communicate different forms of knowledge. In this chapter, we seek to understand knowledge in the inspection context as existing in three phases, namely as embodied, inscribed and enacted (Freeman and Sturdy in Knowledge in policy—embodied, inscribed, enacted, Policy Press, Bristol, pp. 1–17, 2014). The aim is to identify and discuss different phases of knowledge in inspectors’ work by asking how the different forms of embodied, inscribed and enacted knowledge are manifested, incorporated and transformed in the course of inspection. The chapter illustrates how different forms of knowledge are intertwined with issues of legitimacy, accountability and control, which is argued to be important for how inspection and the work of inspectors’ are perceived and judged in different contexts and settings.