To provide a device for forming a fluid malaxation material using general purpose water of hemihydrate gypsum powder, a device that facilitates, with good workability, formation of a fluid malaxation material using general purpose water of hemihydrate gypsum powder as a material having high smooth surface property and thixotropic nature and having little internal foams.

This is a device A for forming fluid malaxation material using general purpose water of hemihydrate gypsum powder. It can be held by varying a shape in a freely recovering manner, and it possesses a transparent or translucent material and a dimension. It is also a general purpose bowl-like body having on the outside face a bowl-like body 3 with a scale 5 marked for measuring general purpose water, a scale which corresponds to measurement of hemihydrate gypsum powder for forming the fluid malaxation material using general purpose water of hemihydrate gypsum powder.