The scientific development becomes the main feature of this era, and the scientific research is the most important factor to develop the societies in all fields, specially the sport. The sport achieves a great progress in the dance, especially the modern dance.           The research aims to identify the efficiency of Cardio training program on some variables of the body composition and the performance level of the female student specialized in the modern dance.           The researcher used the experimental approach using the experimental design with pre and post measurements for two experimental and control groups. The research was applied to 3^rd grade female students specialized in the dance, faculty of Physical Education (girls), Al Zagazig University (2014- 2015) with average age (20.00) years. The fat and skin fold thickness equipment was used in areas: post humeral, low back (lumbar), abdominal, above the iliac bones, above the femur. The body composition analyzer was used to measure the rate of the fat in the body.           The results revealed that the cardio training was statistically significant and positively affect some variables of the body composition and the performance level of the 3^rd grade female students specialized in the modern dance. The experimental group outperformed the control one in terms of some variables of the body composition and the performance level.           The researcher recommends to apply the Cardio training program for its positive effect on some variables of the body composition and the performance level of the 3^rd grade female students specialized in the modern dance.