To provide a preservation case for solid dairy products such as butter which enables the preservation of the solid dairy products in a relatively large block form by subdividing the products simply and easily into small blocks of a specified weight such as 5g each before the preservation thereof and the consumption thereof in the number of small blocks to meet needs after preservation.

In the preservation case which has a housing chamber for the solid dairy products formed inside by detachably fitting an upper case body into a lower case body thereof, a mid underlay member supporting the solid dairy products inside the housing chamber is mounted in the lower case body made free to take out. The mid underlay member on a shelf board supporting the solid dairy products has a rib-like marker, arranged protruding on at least one flat surface of both surface and rear thereof extending in a lattice thereover at a shelf board portion supporting the solid dairy products. A groove is carved into the surface of the solid dairy products corresponding to the marker by pressing the flat surface onto the surface of the solid dairy products. A guide line for the subdivision of the solid dairy products can be formed with the groove.