To provide an art that can perform masking more easily than in the prior art. A support tool (71) that is used in.a powder coating system (70) that electrostatically attaches powder to a workpiece (1), and supports the workpiece (1), wherein in the support tool (71), a region that is in contact with a part of a region not needing powder in the workpiece (1) is formed of an insulator, and restrains adhesion of the powder to the part of the region not needing powder in the workpiece (1).
