The aim of this study was to investigate the dominant types of qualities of effective teachers. The study further aimed at exploring the extent to which the students' and teachers' perceptions are different. The sample of the current study consisted of 150 students and 40 teachers in (16) female public intermediate schools in Al-Madinah Al-Munawarah to participate in the study. To achieve the purpose of the study, data were collected via a four point Likert-scale questionnaire designed by the researcher. The results of the descriptive statistics indicated that the mean and rank of the two types of the qualities of effective EFL teachers revealed that the dominant type among the participants was the instructional skills. Meanwhile, the personal traits of effective EFL teachers were ranked first by teachers and second by students. Additionally, the results of the Independent Sample T-Test showed no statically significant differences in the perceptions of Saudi EFL students and teachers with respect to the qualities of effective teachers.