To provide a contactless flaw detection device allowing accurate connection of tubes, supplying materials to appropriate sections to be detected, to two or more tanks filled with the materials for supplying to the sections to be detected.

The contactless flaw detection device includes a guide tube 10; two or more supply tubes 58b-58d inserted through the guide tube 10 with one end opened at tip side of the guide tube 10, another end extended from a base side of the guide tube 10, and at least one of liquid, gas and solid is supplied from an opening at one end to the sections to be detected, respectively; two or more tanks 59b-59d respectively connected to the two or more supply tubes 58b-58d through joints 57b-57d and filled with at least one of liquid, gas and solid; and an identification unit identifying the supply tubes 58b-58d respectively connected to the two or more tanks 59b-59d.