Cotton wool (1) system of the present invention include surface sheet (2), back foil (3) and configuration what this etc. absorber (4) between thin slices (2,3) vertical elder. In hygienic cotton wool for physiological use (1), both sides (the 2b of surface sheet (2) and absorber (4) in what excretory portion region (A), 4b) it is formed with a pair of inside groove (71), when overlook view, a pair of inside groove (71) system is to the convex bending of width direction (X-direction) foreign side, a pair of outside groove (72) are formed on the surface sheet (2) and absorber (4) in respective width direction (X-direction) outside of what a pair of inside groove (71), when overlook view, a pair of outside groove (72) system is to the convex bending of width direction (X-direction) foreign side. In hygienic cotton wool for physiological use (1), the length of groove (71) on the inside of the long what of the length of outside groove (72), the convex-shaped top (71a) of inside groove (71) configure on the outside of what in the range of the length of groove (72).本發明之衛生棉(1)係包括正面薄片(2)、背面薄片(3)、及配置於該等薄片(2、3)之間的吸收體(4)之縱長者。生理用衛生棉(1)中，於排泄部區域(A)中之正面薄片(2)及吸收體(4)之兩側部(2b、4b)形成有一對內側溝槽(71)，俯視觀察時，該一對內側溝槽(71)係向寬度方向(X方向)外方呈凸狀彎曲，於一對內側溝槽(71)各自之寬度方向(X方向)外側之正面薄片(2)及吸收體(4)上形成有一對外側溝槽(72)，俯視觀察時，該一對外側溝槽(72)係向寬度方向(X方向)外方呈凸狀彎曲。生理用衛生棉(1)中，外側溝槽(72)之長度長於內側溝槽(71)之長度，內側溝槽(71)之凸狀頂部(71a)配置於外側溝槽(72)之長度之範圍內。
