This study aimed to identify educational readiness and willingness of teachers affiliated to the Ministry of Education to use critical thinking in their teaching, in Saudi Arabia. To achieve the study objectives, the descriptive survey method was adopted, and a questionnaire was used to collect data from the study sample which consisted of (733) male and female teachers, randomly selected from education directorates of Makkah, Jeddah, Taif, Al-Baha, Asir, Jazan, and Najran. The questionnaire included three main dimensions;and after testing its validity, and reliability, it was administered to the sample. The study results showed that teachers’ educational readiness scored a high degree of awareness that would allow achieving the goal of teaching by using critical thinking in schools as a teaching strategy approved by the Ministry of Education. The teachers also showed their understanding of the characteristics, skills and educational effects of the application of the critical thinking strategy in schools. The study recommended conducting future studies on the challenges and advantages of applying the critical thinking strategy from the perspective of students and teachers.Keywords: Extent of educational readiness, Critical thinking, Educational effects, School teachers.