This study is designed to analyze the child's behaviour development and consider parent's expectation toward it. In the research of the aspect of child's behaviour development, first, this study will analyze the change and development a child shows according to his age, sex, and the community where he is brought up, and then, the relationship between child's behaviour development and parent's expectation toward it. (1) Child's Behaviour Development. a) According to Age. At the age of three ; In such behaviours as wiping nose, dressing, brushing teeth, putting on coat alone, going to toilet for B.M., going on errands, and playing contentedly alone, washing hands, greeting his elders, a child at the age of three to four shows a rapid development, and therefore it seems better to train a child in these behaviors age of three. At the age of four ; In such behaviors sharing cakes with friends, riding on a tricycle, a child shows great development, at the age of four to five, and therefore it seems better to train him in them at the age of four. At the age of five ; In such behaviors as combing hair, putting toys away in proper place, telephoning a child shows great development at the age of five to six, and therefore it seems better to train him in them at the age of five. b) According to sex and community. As a whole, there is little difference between sexes and the communities. It can be estimated from this that sex or the community has on the whole no great influence on the basic aspects of child's behavior development. (2) Parent's expectation. On the whole parent's expectation falls short of a child's development in behaviors ; especially, bathing himself, dressing, going to toilet for B.M, going to toilet to urinate, telephoning, etc. This tendency is consficuous in the case of three or four year old children. This results from parent's protecting in excess their children and reducing the opportunities to encourage the children's independence by delaying the babyhood. (3) The relationship between child's behaviour development and parent's expectation. a) On the whole, the behaviour of a child is at a higher level than parent's expectation. b) As a child grows from three years to six, his behaviour develops on the whole in accordance with the increase of parent's expectation. But the level of the former is lower than that of the latter. c) According to computing a coefficient of correlation is as follows. 3 years old ; .84 4 years old ; .90 5 years old ; .87 6 years old ; .89 It shows there is a high correlation between child's Behaviour and Parent's Expectation.