A dipping apparatus dipping the workpiece W in a treatment bath. The workpiece is transferred while fixed on a conveying traveling body, and each one flipped upside down together into the treatment bath for carrying out a surface treatment of the workpiece W. The dipping apparatus is provided with a positioning and fixing device to position the conveying traveling body onto the guide rail on the rotation base at a fixed position and to fix the conveying traveling body to the rotation base. A feeding mechanism feeds the conveying traveling body to the fixed position on the rotation base.
