The Present study aimed at developing preparatory school pupils' reading and critical thinking skills through the use of 4MAT strategy. Participants of the study were 60 third year Hassan Idrees preparatory school pupils' at Fayoum governorate. They were randomly assigend to two groups: experimental (N=30) and control (N=30). The researcher prepared a reading test , a scale and a manual. Having pre administered the reading test and critical thinking scale ,the experimental group was taught using 4MAT strategy. The same instruments were administered at the end of the treatment. The results showed that the use of 4MAT strategy proved to be effective in developing preparatory school pupils' reading and their critical thinking skills. The study concluded with some recommendations and suggestions for the pupils, teachers and curriculum designers. Also, suggestions for further research were provided.  Keywords: 4MAT strategy, reading skills, critical thinking skills, preparatory school pupils.