Device for catching insects, comprising: a container, consisting of a body (12) provided with an opening (14) in its upper part and with an opening (16) in its lower part a CO2 generator (18) connected to the inside of the container (12) a powered fan (20) housed inside the container, and a filtering element (22) housed inside the container. The upper opening (14) is defined by a cover (28) arranged at a small distance from the upper end of the body (12) of the container and provided with a peripheral edge (30) inclined downwards, and the lower opening (16) is defined by a plate (34) provided with a peripheral edge (36) inclined upwards and arranged at a distance from the lower end of the body (12) of the container that is at least twice the distance between the cover (28) and the upper edge of the body (12) of the container. The slope of the edges of the upper cover (28) and of the lower plate (34) is comprised between 110 ° and 130 ° relative to a horizontal plane, so as that a closed circuit flow of air and CO2 is produced between the inside of the body (12) of the container and the external surface of the same body.
