To prevent useless loss such as being dissolved more than necessary in using a solid soap or dissolved in storing and be easy to be used even in the case of getting smaller.

A main body 12 of a solid soap case 10 is constituted of a tubular body 26 for storing a soap therein and a plate body 28 which partitions the inside of the tubular body 26 so as to form a soap storage space 18 in one side and can be moved in the direction of the central line of the tubular body 26. A plurality of positioning means for the plate body 28 are arranged in a row on the inner wall of the tubular body along the central line of the tubular body 26 and engagement means which engage each positioning means with the plate body 28 at every time as moving to the each position are provided in a part of the circumferential edge of the plate body 28.