PROBLEM TO BE SOLVED: To provide a pest control aerosol that is so structured that a plenty of pest action inhibitory agent can be adhered to pests in a liquid state to enhance the effectiveness as well as to prevent backfire phenomenon from occurring, when controlling pest by cooling using the heat of vaporization of the pest action inhibitory agent.SOLUTION: A pest control aerosol 1 including an aerosol can 10 containing pest action inhibitory agent that adheres to pests and cool by heat of vaporization to inhibit the action, and a nozzle 30 to eject a pest action inhibitory agent 100 in aerosol can 10, characterized in that, in the nozzle 30, a channel 32 for pest action inhibitory agent 100 flowed out of aerosol can 10 is so formed to communicate to ejection port 31, and the channel 32 is so structured that the cross section on downstream side of a flow direction of the pest action inhibitory agent 100 is larger compared to that of on upstream side.
