To provide a component supply pipe supporting device capable of positioning a component detecting sensor while freely setting a piping attitude.

A component supply pipe 22 is connected to a supply head 16, and components 5 held in the supply head 16 are supplied with a supply rod 1. A deformable support member 17 connected to the supply head 16 is arranged along the component supply pipe 22, and a holding part 24 is connected to the end of the support member 17 to hold the end of the component supply pipe 22. A sensor 31 detecting the number of stand-by components in the component supply pipe 22 is mounted to the component supply pipe 22, and the mounted position of the sensor 31 is set with a positioning structure section 33 adjustable in a position along the support member 17.