To obtain a blade receiving base capable of surely cutting an extremely thin soft material to be cut even though the blade edge of a long cutting blade shows not a linear shape but a wave shape in the longitudinal direction.

The blade receiving base 5 is composed by sticking an extremely thin plate like soft elastic material 7 on the surface of a core material of the soft elastic material 6. A crest part of the blade edge 2 showing the wave shape of the long cutting blade 1 is abutted to the hard material of the surface of the blade receiving base, the hard material is bent by pressing, and the trough part of the wave shape of the blade edge is abutted to the material to be cut by the deflection to cut it.