PURPOSE: To provide a fluid puller to be easily used with high reliability and capable of being manufactured relatively economically and capable of easily removing a fluid device or a fluid module.

CONSTITUTION: This device is formed of a base device 10 around a center shaft, a base cam device 70, and a fluid module 30. The base device 10 holds at least two claw members 21, and has a cylindrical housing wall integrated with a threaded 31 anchor ring 18 inside thereof. The cam device 70 includes a mooring ring 60 to be axially moved along the housing wall and a cam ring 74, and the cam device 70 is engaged with a claw member 21. The fluid module has a plunger 40 having an exchangeable tip part 44. The pressure fluid is supplied from a fluid conduit 37.