A high-density detergent composition comprises 10 to 60% by weight of a surfactant composition having a weight ratio of an anionic surfactant to a nonionic surfactant of 4:10 or more and 10:0 or less, wherein the high-density detergent composition has a bulk density of from 600 to 1200 g/L, and has a total summation of a product of a mass base frequency Wi and a dissolving rate Vi of each group of classified granules obtained by classifying detergent granules by using a classifier, which satisfies the following formula: .SIGMA.(WiVi).gtoreq.95(%), and wherein a mass base frequency of the classified granules having a size of less than 125 .mu.m is 0.1 or less, wherein the classifier comprises sieves each having a sieve-opening 2000 .mu.m, 1410 .mu.m, 1000 .mu.m, 710 .mu.m, 500 .mu.m, 355 .mu.m, 250 .mu.m, 180 .mu.m, and 125 .mu.m, and a receiver.