PROBLEM TO BE SOLVED: To provide a treatment agent composition for fiber product excellent in virus inactivation activity.SOLUTION: There is provided a treatment agent composition for fiber product containing (A) a triazine derivative, and (B) a cation compound represented by a following formula (1), R1R2R3R4 N+ X- (1), where R1, R2, R3, and R4 are each independently selected, 2 of R1, R2, R3, and R4 are a linear or branched alkyl group having 6 to 24 carbon atoms, a linear or branched alkenyl group having 6 to 24 carbon atoms, or a benzyl group, other 2 of R1, R2, R3, and R4 is H, a linear or branched alkyl group having 1 to 5 carbon atoms, a linear or branched alkenyl group having 2 to 5 carbon atom, or -(AO)nR, A is one or more kind selected from a linear or branched alkylene group having 1 to 4 carbon atoms, n represents average addition molar number of (AO), and is 0.1 to 20, R is H or CH3, X- is a monovalent anion of inorganic acid or organic acid, or polyvalent anion with equivalence.SELECTED DRAWING: NoneCOPYRIGHT: (C)2019,JPO&INPIT【課題】ウイルス不活化活性に優れた繊維製品用処理剤組成物を提供する。【解決手段】(A)トリアジン誘導体、及び (B)以下の式(1)で表されるカチオン化合物 R1R2R3R4N+ X- (1)(式中、R1、R2、R3及びR4は、それぞれ独立に選択され、R1、R2、R3及びR4のうち2つが、炭素数6~24の直鎖若しくは分岐アルキル基、炭素数6~24の直鎖若しくは分岐アルケニル基、又はベンジル基であり、R1、R2、R3及びR4のうちの他の2つが、H、炭素数1~5の直鎖若しくは分岐アルキル基、炭素数2~5の直鎖若しくは分岐アルケニル基、又は-(AO)nRであり、Aは、炭素数1~4の直鎖又は分岐アルキレン基から選ばれる1種又は2種以上であり、nは、(AO)の平均付加モル数を表し、0.1~20であり、RはH又はCH3であり、X-は、無機酸若しくは有機酸の1価のアニオン又は当量の多価のアニオンである。)を含む、繊維製品用処理剤組成物。【選択図】なし