This paper investigated the instructors' perceptions of supervisors' classroom observation practices at Taif University English Language Center (TUELC) in the second semester of the 2018-2019 academic year. The researcher attempted to answer two questions. The first investigated the instructors' perceptions of supervisors' classroom observation practices. The second question investigated the instructors' suggestions for better practices by supervisors. A 4-Likert scale questionnaire was used to gather data from fifty nine instructors to answer the first question, and content analysis was used to answer the second question. The collected data were analyzed in the form of descriptive statistics, using means, standard deviation, frequencies, and percentages. The results showed that the instructors were generally satisfied with the supervisors' classroom observation practices. However, some had certain concerns regarding some observation practices to be considered for further action of improvement. In addition, the instructors had several suggestions for better practices implemented by supervisors. The most important of these was the suggestion to conduct peer observation. Based on the results, the researcher drew several conclusions and recommendations.