The present invention relates to a granular detergent composition having easy measurability and distributivity suitable for spoon measurement, a bulk density thereof being 500 g/L or more, containing a surfactant, a water-insoluble inorganic compound and a water-soluble salt, wherein the granular detergent composition has a variance of powder dropping rate V of 1.0 or less, an inserting pressure P of 80 gf/cm or less, a &Dgr; dropping ratio D of 14% of les, and an index K of from 30 to 230, the index K being represented by the equation: K=P×exp (0.135×D), wherein P stands for an inserting pressure (gf/cm), and D stands for a &Dgr; dropping ratio (%); and a process for preparing the same.