Abstract: Women's clothing has a slidable adjuster A provided between left and right breast cup portions (1, 1'). The adjuster A comprises an outer casing (10) and sliding portions (20). The wearer can change the positions of engagement between first engaging portions (12) provided in the outer casing (10) and second engaging portions (20) provided in the sliding portions (20) by operating the sliding portions (20), so that the distance between the breast cup portions (1, 1') can be adjusted to a desired level either when the clothing is being put on or after the clothing is put on.