Provided is a disposable warmer in which the fragrance-releasing effect of a fragrance material can be exhibited and heat generation can be kept stable while an unpleasant smell derived from an iron powder is reduced. In an air-permeable bag 1, an exothermic composition including an iron powder, an activated carbon 3, a salt, a water absorbent resin, and water, a fragrance material 4, and a fragrance material adsorption inhibition agent 5 for inhibiting the adsorption of the fragrance material 4 into the activated carbon 3, are enclosed. The fragrance material adsorption inhibition agent 5 includes a low active substance having an iodine adsorption performance lower than that of the activated carbon 3. The low active substance is a precursor of the activated carbon before activation, preferably a carbonaceous material.
