This study is to find out what are the better training methodolgies, between the simply reacted motion and the discriminative motion in Tae Kwon Do practice, especially on the speedy kicking techniques, with the Ap Joo Choom stance and the Ap Cha Gi. (most commonly used basic stance and kicking method in free fighting) Randomly selected 30 Tae Kwon Do expert were taken as sample, and they were classified in to 3 groups of 10 members each; Lower dan group; 1st dan black belt holder Middle dan group; 2nd-3rd dan black belt holder Higher dan group; 4th-5th dan black belt holder The deviced insturment for kicking speed analyzer; composed of flexible kicking targets of which height can be equalized to kicker’s face, stomach, lower part of belly, and also equiped with a simple stimulus signal or descrinative stimulus signal of light (red yellow green colored light bulb) for start kicking the designated target with 1/1000 Sec, measurable digital chrono scope. The test of kicking speed was conducted in 5 minute interval on 10 trials. The results obtained as follows. 1. kicking time and significant variance at simple start kicking signal 1) In kicking the face target Lower dan group; on average 0.721 Sec. Middle dan group; on avergae 0.660 Sec. Higher dan group; on avergae 0.633 Sec. The significant variance; p<0.01 2) In kicking the stomach target Lower dan group; on avergae 0.641 Sec. Middle dan group; on avergae 0.601 Sec. Higher dan group; on avergae 0.5641 Sec. The significant variance; p<0.01 3) In kicking the lower part of belly Lower dan group; on avergae 0.614 Sec. Middle dan group; on avergae 0.581 Sec. Higher dan group; on avergae 0.541 Sec. The significant variance; p<0.01 2. kicking time and significant variance at descritive start kicking signal 1) In kicking the face target Lower dan group; on avergae 0.770 Sec. Middle dan group; on avergae 0.701 Sec. Higher dan group; on avergae 0.665 Sec. The significant variance; p<0.01 2) In kicking the stomach targe Lower dan group; on avergae 0.701 Sec. Middle dan group; on avergae 0.640 Sec. Higher dan group; on avergae 0.617 Sec. The significant varinace; p<0.01 3) In kicking the lower part of belly Lower dan group; on avergae 0.677 Sec. Middle dan group; on avergae 0.616 Sec. Higher dan group; on avergae 0.594 Sec. The significant varivance; p<0.01 3. In kicking the face, stomach, lower part of belly according to the simple stimulus kicking start signal or descrimivative stimulus kicking start signal of each group; The kicking time is shortened according to the grade of dan in Tae Kwon Do is higher; with significant variance of p<0.01 level. Above all kicking techniques of Tae Kwon Do can be preferably developed in use of both method such as Simply reacted motion and descriminative during the course of training instruction.