Abstract: The present invention relates to [1] a pest repellent including, as an active ingredient, at least one liquid oily component selected from the group consisting of a silicone oil, an ester oil, an ether oil, a hydrocarbon oil, an aliphatic higher alcohol having 14 or more carbon atoms, and a polyhydric alcohol, the liquid oily component having a surface tension at 25° C. of 40 mN/m or less and a viscosity at 23° C. as measured with a B-type rotational viscometer of 1,200 mPa·s or less; [2] a pest repellent composition containing the aforementioned liquid oily component and not containing an effective amount of other pest repellent; and [3] a method for repelling pests, including applying the aforementioned pest repellent or pest repellent composition onto the skin surface of a human such that the amount of the liquid oily component is 0.1 mg or more per 1 cm2. The pest repellent of the present invention is excellent in repellent effect against pests, particularly flying pests, and is safe and has a low odor.