PURPOSE: To efficiently carry out agitation, mixing and transportation with one device by vibrating an agitation body reciprocatingly along the flow direction of fluid passage in a guide pipe and providing transportation means of such a shape that the area blocking the fluid passage is reduced towards the upstream side in the guide pipe.

CONSTITUTION: The agitation body 12 having plural agitation blades 14 is disposed into the fluid passage in the guide pipe 10, and is reciprocatingly vibrated along the flow direction of the fluid passage in the pipe 10 by a vibration source 22. Moreover, such a transportation means is provided that is disposed to block the fluid passage in the pipe 10 and is made to reduce the area blocking the fluid passage towards the upstream side in the pipe 10. Namely, the agitation of fluid is carried out by the agitation body 12 as well as the transportation of fluid is carried out in the guide pipe 10 by utilizing the difference of resistance in the reciprocating vibration of the transportation means 16. Consequently, agitation, mixing and transportation is efficiently carried out by one device.