[Problems] The objective is to provide a new low-toxic drug for external use for intractable diseases, such as erosion, decubitus, and skin ulcer, that prevents cicatrization and reduces iodine accumulation on wound surfaces with sufficiently promoting healing.[Means for solving problem] Preparation of a wound treatment drug for external use containing oily bases and iodine but substantially no white soft sugar, which is a characteristic of the drug of this invention. The invented drug prevents infection through the wound surface due to a sufficient bactericidal effect of iodine, and promotes wound healing, prevents cicatrization and reduces iodine accumulation on the wound surface by maintenance of appropriate moisture in the wound surface due to a moisturizing effect of oily bases.