To provide a surface finish treating method by which surface finish is effectively performed without taking much trouble over the handling of materials to be treated.

In a method in which treating materials 31, 32 and materials to be treated 30 are housed in an oscillation tank 1 and the oscillating tank 1 is oscillated to perform surface finish treatment for the material 30, the materials 30 are inserted into the oscillation tank 1 in which the materials to be treated 30 are clamped by a clamping means 22 and the treating materials 31, 32 are housed and which is oscillated to subjected the materials 30 while being held to surface finish treatment.