A diglycerin derivative-modified silicone that has a halogen atom-substituted or unsubstituted monovalent hydrocarbon group having 9 to 30 carbons per moleculethat has only a glycerin derivative group whose average value of the number of repetitions of glycerin units is in a range from 1.1 to 2.9, wherein the glycerin derivative group is a diglycerin derivative group-containing organic group expressed by the following general formula: wherein, R 5 is a divalent organic group that does not comprise an oxyalkylene structure wherein an average value of the number of repetitions of the oxyalkylene unit is two or more, or a (poly)glycerin derivative group expressed by the following general formula: wherein, R 5 is synonymous with that described above, and the diglycerin derivative-modified silicone is represented by the structural formula below: wherein, R 1 is a halogen atom-substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbons, alkoxy group, hydrogen atom, or hydroxyl group; R 2 is a halogen atom-substituted or unsubstituted monovalent hydrocarbon group having 9 to 30 carbons; R Si is a chain organosiloxane group expressed by the following general formula: wherein, R 11 are halogen atom-substituted or unsubstituted monovalent hydrocarbon groups having from 1 to 30 carbons, hydroxyl groups, or hydrogen atoms, and at least one of the R 11 moieties is the monovalent hydrocarbon group; t is a number in a range of 2 to 10; and r is a number in a range of 1 to 500; or the following general formula: wherein, R 11 and r are synonymous with those described above; and L 1 represents the formula C 2 H 4 Si(OSiMe 3) 3; Q is a glycerin derivative group having an average value of the number of repetitions of a glycerin unit in a range of 1.1 to 2.9; and wherein R is selected from among R 1, R 2, R Si, L 1, and Q; however, when n2=0, at least one R is R 2, and when n5=0, at least one R is Q; (n1+n2+n3+n4+n5) is a number in a range from 20 to 90; n1 is a number in a range from 0 to 100; n2 is a number in a range from 0 to 100; n3 is a number in a range from 0 to 20; n4 is a number in a range from 0 to 20; and n5 is a number in a range from 0 to 20. wherein, R 5 is synonymous with that described above, and the diglycerin derivative-modified silicone is represented by the structural formula below: R 1 is a halogen atom-substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbons, alkoxy group, hydrogen atom, or hydroxyl group; R 2 is a halogen atom-substituted or unsubstituted monovalent hydrocarbon group having 9 to 30 carbons; R Si is a chain organosiloxane group expressed by the following general formula: wherein, R 11 and r are synonymous with those described above; and L 1 represents the formula C 2 H 4 Si(OSiMe 3) 3; Q is a glycerin derivative group having an average value of the number of repetitions of a glycerin unit in a range of 1.1 to 2.9; and wherein R is selected from among R 1, R 2, R Si, L 1, and Q; however, when n2=0, at least one R is R 2, and when n5=0, at least one R is Q; (n1+n2+n3+n4+n5) is a number in a range from 20 to 90; n1 is a number in a range from 0 to 100; n2 is a number in a range from 0 to 100; n3 is a number in a range from 0 to 20; n4 is a number in a range from 0 to 20; and n5 is a number in a range from 0 to 20.