The research aims to first identify the relationship between the variables under study (length ,weight and mental vision) and the skill performance of the rhythmic gymnastics in the research sample , secondly to find percentage of the contribution of the variables under study (length ,weight and mental vision) on the skill performance of the rhythmic gymnastics in the research sample, thirdly to predict the skill performance of gymnastics Rhythmic in terms of the variables under study (height ,weight , mental vision) in the research sample, and the research depended on the descriptive approach in the style of correlational studies, Body mass (weight) and mental perception test ,and after applying the final ,the data was dealt with statistically using the statistical era spss number of conclusions were reached including :                                                                                                     
Fist-the proportion of the contribution of length, mass and mental perception to skill per for manse, each variable separately   ,   appeared in small percentages   ,   while   other variables contribute to   skill performance in rhythmic gymnastics   .                                                                                        
Second- the correlation coefficient of height, mass   ,   and    mental perception in skill performance, each variable separately   , appeared    weakly   .                                                                                                   
Third- the variables of height, mass    ,   and   mental perception in the skill performance in a collective way achieved percentage of contribution