An organopolysiloxane having a substituent shown in formula (1),—R1—(NR2—R3-)n-NR4R5 (1)wherein R1 represents a divalent hydrocarbon group having 1-10 carbon atoms R2, R4, and R5 each independently represent a hydrogen atom, a monovalent hydrocarbon group having 1-10 carbon atoms, a quaternary ammonium salt-containing group shown by the formula (2), or a polyoxyalkylene group shown by composition formula (3) R3 represents a divalent hydrocarbon group having 2-10 carbon atoms at least one quaternary ammonium salt-containing group shown by formula (2) and at least one polyoxyalkylene group shown by the formula (3) are contained in one molecule of organopolysiloxane and “n” is 0-3wherein R6 represents a hydrogen atom or a monovalent hydrocarbon group having 1-30 carbon atoms “a”, “b”, and “c” are each independently 0-100. This organopolysiloxane is able to protect hair through the superior adsorptive affinity, to add conditioning effects.
