This study is to develop the well-fit brassieres by wearing test of available brassieres for girls . The 11 elementary school girls aged 12 participated in the wearing test. The test procedure consisted of a rating on fit and performance according to brassiere types, a try on test of 3 types of brassiere and a sensory test on fit. The results of this study are as follows ; 1. The results of fit rating on different brassieres. Compared among brassiere types, tank top type proved the most effective, from a viewpoint of wearing effects. All types of brassiere performed well in bust up effect. Especially tank top type brassiere showed the best of them. 2. The results of the sensory test and comparative test. With regard to wear comfort, most of the subject assessed tank top brassiere to be the most comfortable . As for freedom of movement, it is disclosed that the subjects prefer tank top brassiere. As a result, brassiere for girls strongly require size adjustment, physical and psychological comfort through full overage of breast area.