To provide a Shirasu soap which exhibits a pore-cleaning and waste product-removing effect and a skin moisture effect with no stimulus and further also exhibits atopic dermatitis-suppressing effect.

The Shirasu soap has a soap base material made from coconut oil, at least volcanic ash Shirasu, tocopherol (or a derivative thereof, for example, tocopheryl acetate) and propolis as essential components, further contains at least one selected from a group consisting of olive oil, squalene, hyaluronan, perfume and glycerin and exhibits the pore-cleaning and waste product-removing effect and the skin moisture effect with no stimulus. Otherwise, the Shirasu soap further contains at least one selected from a group consisting of peanut oil, hinokitiol, aloe vera, ceramide, green tea and penny royal mint oil and also exhibits atopic dermatitis-suppressing effect.