The research was aimed at a mechanical study of The Skill of Morote Seio nage in Judo During performance in different areas to determine the extent of the difference in biomechanical indicators between performance on the edge of the rug and in the carpet for the skill of Morote Seio nage ، The researcher used the descriptive method using the method of kinetic analysis on a sample consisting of one international player within the players of the Egyptian judo team and holds the black belt (Dan 2)، The researcher reached a number of results, including that motor speed is very important during the performance of the skill of Morote Seio nage either in the middle of the rug or at its edge, The percentage of time it took for the actual throw relay was 37.18% during the performance in the middle of the rug, while the ratio was 33.03% during the performance at the edge of the rug, compared to the total time of skill.