The purpose of this study was to test the effect of rope skipping on physical work capacity. 30 physical education students at K-university were selected and divided into two groups : One was the control group with 15 students and the other was the training group with 15 students. Rope skipping was performed by 15 students of the training group everyday once in the morning and afternoon except on Saturday and Sunday. For the first four weeks the training group jumped rope at a rate of 150 times per minute for 5 minutes. For the next eight weeks at intervals of 4 weeks the training time was increased by two minutes for workout periods of 7 and 9 minutes respectively. To evaluate the change of body composition, skin fold thickness, fat percentage and lean body mass of each member was measured. To evaluate the change of physical fitness, leg strength, arm strength, back strength, power, flexibility and ability of each member was measured. To estimate the change of physical work capacity, heart rate, ventilation, respiratory frequency all out time and PWC₁₇₀ of each member was measured by using a cycle ergometer. A test of each participant’s physical examination was conducted once before and after the experiment. The results of data analysis are as follows : 1) Weight, skinfold thickness and body fat of each member of the training group decreased significantly more than those of the control group. 2) No significant change was revealed in leg strength, arm strength, back strength, power, flexibility and agility of each member in the control group, while change of those in the training group increased significantly after the 12 weeks experimentation. 3) All out time, running distance and PWC₁₇₀ of those in the training group increased significantly while all out time, running distance and PWC₁₇₀ for those in the control group decreased. 4) Heart rate during rest, exercise and recovery significantly decreased for those in the training group while heart rate for those in the control remained the same. 5) Ventilation during rest, exercise and recovery for those in the training group significantly increased while ventilation for those in the control group remained the same. 6) The respiratory frequency of those in the training group decreased to a rate lower than to those in the control group, but the result was not significant. Based on the result of the experiment, body fat of those in the training group decreased, physical fitness significantly increased and respiratory circulation of the training group improved. Therefore, a-12-week period of rope skipping revealed to be effective exercise.