It is intended to provide a device for capturing a pest insect by which a pest insect attracted into a container is effectively captured and/or exterminated, and a method of capturing a pest insect. A device for capturing a pest insect comprising a container having an opening and a number of gel particles which are contained in a layered state in the container and contain an insect attractant characterized in that voids into which pest insects can enter are formed among the layered gel particles.