To provide a deodorant for diapers, a deodorant suitably used for nursing care of elderly people or disabled people.

Acid peroxide compound is dissolved in distilled water at a ratio of 50-5 wt.% as an original liquid, poured in a spray container made of synthetic resin, and sprayed on bodily wastes stuck to a diaper for deodorization. This acid peroxide compound consists essentially of potassium hydrogen monopersulfate used for a pool, hot spring facilities and the like, is free from volatility, safe even if adhered to a human body, and also frequently used as an inexpensive deodorant.