Abstract: A sanitary article that is used to cover the crotch portion of a human body so as to prevent excretions of the human body from leaking to the outside includes a liquid-permeable surface thin layer, a liquid-impermeable back thin layer and a liquid-absorptive core layer sandwiched between the above two layers. The liquid-absorptive core layer is provided with a draining means for allowing some of the excretions of the human body to pass through. A detecting body is provided between the liquid-impermeable back thin layer and the liquid-absorptive core layer, thereby receiving the excretions guided by the draining means. A window portion is provided on the liquid-impermeable back thin layer at a position corresponding to the detecting body. Via this arrangement, the use can observe the reaction represented by the internal detecting body directly via the window portion.