This aqueous pest control liquid including a pyrethroid compound represented by formula (1), wherein R 1 and R 2 are the same or different and represent a hydrogen atom, a methyl group, a trifluoromethyl group or a chlorine atom, and R 3 represents a hydrogen atom, a methyl group or a methoxymethyl group, an ester compound having a vapor pressure at 25°C by Donovan method of 1 × 10 -10 to 1 × 10 -4 mmHg and one or more (C4-C12 alkoxy) carbonyl groups, a glycol ether and water can volatilize a fixed amount of pest control component for a long period of time, and has an excellent pest control effect.
