© 2020. All Rights Reserved.In this study, the inspection practices of Ofsted, which is an independent government institution in the UK and one of the most important and effective inspection organizations in Europe in the field of education, and affect of Ofsted inspection on school improvement were examined. In the study, document review method was used in accordance with the qualitative research approach. The findings are presented on the basis of two main titles. These are: (i) Ofsted’s institutional structure, main inspection practices and processes, (ii) the effects of Ofsted inspections on school improvement. In line with the findings obtained in the study, it has been seen that Ofsted sets a good example in inspection practices; maintains its strength and influence in school evaluation processes with its independent status and institutional structure; Ofsted inspections can help to accessing the national strategies and standards; is effective in changing teachers’ classroom practices, methods and techniques; contributes to the increase of students’ achievements. However, it has been observed that it can increase stress and pressure on schools and there is insufficient evidence for its positive effects in the context of school development in the long term.