Some 1436 school children from grade 4 to grade 9 were sampled as to their self-expressed happinesses, angers, sadnesses, fears and worries and their reactions to these emotions. The subjects were divided into the elementary school group and the junior high school group. Their responses were analyzed and placed into specific categories. Both groups were compared by sex in each category for each five mentioned emotions. Certain differences were noticed between sexes and as well as between groups. 　　Generally speaking, the elementary school children tended to regard school success and personal achievement as the happiest experience in daily life. Holidays, festivals and recreational activities were the next two frequentl ymentioned categories. For the adolescents, the same tendency was found. However, the percentage of the former category was increasing with age and those of the latter two categories were decreasing with age. 　　The most mentioned incidences of anger by the elementary school children were in the categories of behavior of other person, frustration derived from school work and personal restrictions. There were significant developmental changes, boys greater than girls, in the categories of belongings broken or lost, behaviors of other person and being punished, all increasing with age. 　　The most mentioned fears of the elementary school children were in the categories of natural disaster, being left alone in the dark, and accident, injury and threat to personal safty. For the adolescents, the above mentioned fears were decreasing along with age. Instead, the fears of school life and the• future were increasing. Girls were more afraid of animals and darkness than boys. 　　The sad experiences of the subjects centered around the category of sickness and death of the members of the family. The percentage of this category was decreasing with age. On the other hand, the percentage of categoy of school life was increasing with age. 　　The most mentioned worries of the subjects were in the categories of school work, being punished, family life, peer relationship and personal weakness. 　　The major patterns of emotional responses were almost the same for both children and adolescents. They laughed while they were happy they cried, ran away or asked for help while they were in great fear. They attacked while they were angry. Withdrawal responses and positive responses to overcome the difficulties and frustrations were increasing with age.