The utility model relates to a small thing box and comprises a portable pair of left and right container main bodies 12, 13 with inner surfaces respectively provided with a plurality of small thing accommodating chambers 14 connected by a hinge 11, an inner cover 26 being pivoted on the container main bodies 12, 13 and opening and closing optional number of small thing accommodating chambers 14 among a plurality of small thing accommodating chambers 14 and a hooking and separating device for hooking or separating the inner cover 26 and the container main bodies 12, 13. Therefore, the small thing box is portable and can separate and accommodate small things with the big capacity and multiple kinds according to kinds. When the small thing box is opened, the small things accommodated can not fall out of the box or be mixed with other kinds of small things.