<;P>;PROBLEM TO BE SOLVED: To provide a mitochondria function-improving agent, energy consumption-promoting agent or fat combustion-promoting agent useful as a medicine, a food or the like. <;P>;SOLUTION: There is provided the mitochondria function-improving agent, energy consumption-promoting agent or fat combustion-promoting agent containing sphingomyelin as an active ingredient. The mitochondria function-improving agent or the like can not only be administered into human and animals, but can also be compounded with various foods, drinks, medicines, pet foods, and the like as an active ingredient. An administration form on the employment of the mitochondria function-improving agent or the like as the active ingredient for medicines or quasi drugs includes the oral administration forms of tablets, capsules, granules, powder, or syrups, and the parenteral administration forms of injections, suppositories, inhalations, percutaneous absorption agents, or external preparations. <;P>;COPYRIGHT: (C)2011,JPO&INPIT