PURPOSE: To obtain the subject crystals having a high ratio of attaining to vesicula and a high utilization ratio of an active ingredient, and useful as an antiasthmatic agent by treating fine powder of a specific steroid derivative with a combination of specific solvents.

CONSTITUTION: This crystal for inhaling powder preparation is obtained by adding (C) an aggregating solvent for aggregation and precipitation to (B) a suspension liquid of (A) fine powder of methyl (+)-9α-chloro-6α-fluoro-11β- hydroxy-16α-methyl-3-oxo-17α-propionyloxyandrosta-1,4-diene-17β-carboxylate of the formula. Furthermore, it is preferable that combinations of the component B with the component C are such that the component B is water and the component C is ethyl acetate or the component B is hexane containing ≤40% acetone and the component C is water, and e.g. it is preferable to suspend the component A with 3-20 fold amount of water based on the component A, pulverize it, suspend the powder by adding 3-20 fold amount of water based on the emulsion, add thereto 5-20 fold amount of ethyl acetate of the component C based on the component A, and to agitate the mixture at ≤40°C for 30min to 2hr.