To provide a storage case for fixing paintbrushes and writing things with the paintbrushes and the writing things stored therein while minimizing the number of components.

This storage case is integrally molded by blow molding of synthetic resin for preventing damage of the paintbrushes and the writing things, a lid and a bottom are separated by cutting work, side faces obtained by forming several vertical long cuts accorded with the shaft diameters of the paintbrushes and writing things on the upper part of the base are bent inward 90 or more, the side faces oppress the shafts of the paintbrushes and writing things by a spring-back effect characteristic of the material to fix the shafts of the paintbrushes and writing things. The storage case of a paper material is provided by integrally cutting out a development face and, similarly to the synthetic resin, fixing the shafts of the paintbrushes and writing things with the inward bent side faces.