The purpose of the invention is to provide a production method and production device for clothing articles, the method and device being able to fold the main body in half while inhibiting damage of the main body and also able to maintain the folding position of the main body after the bifolding process, and to provide the clothing article. The method includes a process of preparing a first adsorbing part (34a) and a second adsorbing part (34b), a process of disposing the first adsorbing part and the second adsorbing part (34b) so that the surface of the first adsorbing part (34a) and the surface of the second adsorbing part (34b) are disposed side by side facing the same direction, a process of adsorbing the front surface of the main body (2) of a developing roll (1Z) to the first adsorbing part (34a) while also adsorbing the back surface of the main body (2) of the developing roll (1Z) to the second adsorbing part (34b), a process of folding the first adsorbing part (34a) onto the second adsorbing part (34b) to fold the main body (2) in half, and a process of releasably joining the overlapping parts of the developing roll (1Z) that have been superposed by the bifolding process.La présente invention concerne un procédé et un dispositif de production d'articles d'habillement, lesdits procédé et dispositif étant capables de plier le corps principal en deux sans l'endommager, de maintenir le corps principal en position pliée après l'étape de pliage en deux et de produire l'article d'habillement. Le procédé inclut une étape consistant préparer une première partie adsorbante (34a) et une seconde partie adsorbante (34b), une étape consistant à disposer ladite première partie absorbante et ladite seconde partie adsorbante (34b) de telle manière que la surface de la première partie adsorbante (34a) et la surface de la seconde partie adsorbante (34b) se trouvent côte à côte et dans le même sens, une étape consistant à adsorber la surface avant du corps principal (2) d'un rou
