This study aims to find out the relationship between the training of Taekwondo and the development of character for the pupils of primary schools. For the purpose of this study, the groups who get Taekwondo training and the groups who do not were compared to find any differences in the levels of character development according to their training. Next, the trainees in the training groups were observed to find the differences in each sub-factor according to the individuals` demographic and socioeconomic backgrounds. Finally, the trainees in the training groups of Taekwondo were also compared to find any differences in the levels of character development according to the levels of their training. As for the subjects of the study, the 3∼6 graders of the primary schools located in Seoul are the population, the area sampling and the cluster sampling are used side by side, and 2,139 pupils are the efficient sampling chosen from those who have received the training more than one year and those who have not received any training. As for the subjects of the study, the 3-6 graders of the primary schools located in Seoul are the population, the area sampling and the cluster sampling are used side by side, and 2,139 pupils are the efficient sampling chosen from those who have received the training more than one year and those who have not received any training. The findings of this study were as follows: First, in the comparative analysis of the differences in the levels of the character development according to the training of Taekwondo, the pupils who are trained more than a year on end show noticeable statistical higher levels in all the seven sub-factors of character than the pupils who are not. Second, it was analyzed whether the demographic and socioeconomic backgrounds according to the sexes, the grades, the school records, the levels of the domestic economy, the schooling of the parents, and the jobs of the parents influence the character development of the Taekwondo trainees. The higher the grades are, the higher the levels of the character development become proportionally. In the analyses according the sexes, the character of the schoolboys shows relatively higher levels compared with the schoolgirls in all areas except Attention, and there are noticeable statistical differences in Competency, Leadership, and Respect & Manner. The school records show phenomena remarkably proportionate to character, and in particular, the higher the levels of Attention, Competency, and Leadership become, the higher they are likely to be. In terms of the levels of the domestic economy, Patience, Attention, Competency, Self-esteem, and Leadership show noticeably high statistical differences. In terms of the schooling of the parents, there are differences in average scores both in the fathers and mothers, but there are no noticeable statistical differences. These results show that the schooling of the parents do not influence the character development of the pupils noticeably. Third, in the analysis of the differences of the character development according to the grades of the training of Taekwondo, the levels of the character development show noticeably high statistical differences according to the grades in all the sub-factors forming character.