The toner transport device of the present invention includes a toner
transport pipe, internally having a toner transport path for allowing
toner to pass therethrough, which is disposed so that the toner transport
path extends in an up-and-down direction and which vibrates in upward and
downward directions. Further, on an upper joint section and a lower joint
section of the toner transport pipe are provided an upper foamed elastic
member and a lower foamed elastic member which internally has a toner
passage for allowing the toner transported to/from the toner transport
path to pass therethrough, wherein a wall surface of the toner passage is
coated with a resin layer which does not allow the toner to pass
therethrough. As a result, it is possible to properly prevent retention
and solidification of toner in the toner transport path by the
upward-and-downward vibration of the toner transport member and it is
possible to properly prevent toner from leaking from the toner transport
device.