The purpose of this study was to measure the velocity and the power between track cyclists and road cyclists in pedaling bicycle ergometer and to clarify the relationship between revolutions minute (R.P.M) and power in each load of two subject groups. Exercise load was composed of 3-6kp, in which subjects in each load performed all-out effort during 12 seconds. The results of the study were summarized as follows : 1) Maximum covering velocity, average covering velocity, and pedaling R.P.M. in both groups of subjects were shown in decreasing tendency when the load was increased. Especially, the value of track cyclist group was shown higher than that of read cyclist group. 2) The acceleration from start to maximum power appearance time in both groups was shown the decreasing tendency, when the load was increased. The changes of acceleration between two groups were 3kp-0.12m.sec², 5kp-0.31m.sec²and 6kp-0.72m.sec². 3) The average power was shown the growing tendency, when the load was increased, and the average power of track and road cyclists was 686.25N.m/sec and 611.5N.m/sec respectively. 4) In anaerobic maximum power, track cyclist group was 846.13N.m/sec and road cyclist group was 691.4N.m/sec. Therefore, The value of track cyclist group was higher than that of road cyclist. 5) The relationship between the velocity and the power of them had the tendency that the former was slower and the later was more increased, according to the increase of load.