A composition for controlling pests includes a compound represented by the formula (1) or N-oxide thereof: and 4-oxo-4-[(2-phenylethyl)amino]-butyric acid. A method for controlling pests has a step of applying to plants, plant seeds, bulbs, or soil where plants grow an effective amount of the composition for controlling pests. The composition for controlling pests and the method for controlling pests exhibit excellent controlling efficacy on pest.