Abstract
This research pursued an uncomfortable shape of a cock in a washstand. We made on experimental basis the 31 pieces of cock model. The shape of them is classified into two large groups. One is the group of three-cornered shape (16 pieces). Another is the group of many-sided shape (15 pieces). 10 persons of different sexes tried out them experimentally and answered a questionnaire which has SD scale. As a result of factor analysis, it was founded that there were a comfortable shape that man and woman who has different size of hands can use together. The shape is not produced commercially yet. This approach is important for universal design method.
