To provide a simple and easy-to-manufacture assembling/disassembling tool, which facilitates assembling/disassembling a turbine device to improve maintainability, and is commonly used to reduce a storage place and cost.

The assembling/disassembling tool 31 for moving and positioning suspended components alone (for example, a gas inlet inside casing 3, an air guide casing 4 and a compressor wheel 16) of an exhaust turbocharger 1, includes a suspension part (suspension holes 41-44) which uses a crane for suspension, and includes a plurality of holding parts 46, 47 and 48 for holding at least two kinds of the components 3, 4 and 16 alone. The suspension holes 41-44 are arranged in an upright position where the assembling/disassembling tool 31 is not inclined when suspended without cargo, and a position where the held and suspended components 3, 4 and 16 are assembled to the exhaust turbocharger 1.