A storing and/or transferring method of an alkoxy(poly)alkylene glycol-containing material for cement additive polymer

• which comprises a step of filling a vessel, a step of storing and/or transferring and a step of drawing out, in that order, said alkoxy(poly)alkylene glycol being represented by the following general formula (1);

  R¹O(R²O)_nH  (1)

  in the formula, R¹ represents a hydrocarbon group containing 1 to 30 carbon atoms, R²O group represents an oxyalkylene group containing 2 to 18 carbon atoms and each R²O group may be the same or different and n represents the average number of moles of the oxyalkylene groups represented by R²O as added and is a number of 0 to 300, and

• said step of storage and/or transfer being carried out at a temperature not higher than the solidifying point of the material for cement additive polymer.