A manufacturing method for a dry type blood purifier (1) not preloaded with water is characterized as comprising a first water-content adjustment step (a first drying step) during which average water-content value of a hollow fiber membrane is adjusted to 50 wt% or more but less than 300 wt% at a stage preceding a sterilization step using exposure to radiation, and a second water-content adjustment step (a second drying step) during which the average water-content value of the hollow fiber membrane is adjusted to less than 50 wt% after the sterilization step.
