objectives: The aim of the current study was to evaluate distalization of the maxillary 1st molars by sliding mechanics depending on the numbers of miniscrews. Materials and Methods: The current study was conducted on a total sample of twenty adult orthodontic patients presented with class II maxillary permanent first molars indicated for distalization with an age ranged from 18-23 years. For every patient enrolled in the present study, routine orthodontic records were taken before the treatment and after eight months or the end of distalization. Patients were treated by using EZ slider as a distalizer with one miniscrew inserted on the buccal side between the 1st permanent molar and the 2nd permanent premolar and in the other side the distalizer EZ slider with two miniscrews inserted in which one inserted between the 1st permanent molar and the 2nd permanent premolar and the next miniscrew was inserted between the 2nd permanent premolar and the 1st permanent premolar. Results: The side in which two miniscrews inserted and the EZ slider showed more distal movement of the 1st permanent molar than the side with one miniscrew and the EZ slider due to the double force used. Conclusion: EZ slider is a simple and an effective appliance for molar distalization. Which has no specific protocol to be used effectively.