As one of the leading arbitration institutions globally, the Arbitration Institute of the Stockholm Chamber of Commerce (the “SCC”) has seen a slight increase in the number of challenges against arbitrators over the past decade.This article outlines the procedure and the legal standard applied in challenges at the SCC and provides a brief overview of SCC Board decisions on challenges during the period 2010–2019. In addition, summaries of decisions on challenges made during 2019 are provided. Based on the decisions made during this period, conclusions are drawn regarding the nature of the challenges and the principles applied by the SCC Board in its decisions.