As a composition for pest insets and a spray device for pest insects being capable of sustaining effects of exterminating or controlling pest insects and being inexpensive, it is intended to provide: a gel composition for pest insects which is a thixotropic gel containing at least one of an ingredient of controlling pest insects and an ingredient of attracting pest insects, a gelling agent and a solvent and being jetted by a jetting unit from a container that is maintained at atmospheric pressure and stuck in the form of a gel to the subject and a gel spray product for pest insects comprising a container in which the above-described gel composition for pest insects is stored while maintaining at atmospheric pressure, and a pump type jetting unit for jetting the gel composition for pest insects which is attached to the container as described above.
