Provided is a pest control aerosol which is free from troubles such as fires or burns while stored and when used. The pest control aerosol comprises a pressure-tight container (1) and a head cap (2). The pressure-tight container (1) contains therein a pest behavior inhibitor (A) comprising HFC-152a as an active ingredient and having injecting and cooling actions. The pressure-tight container (1) is equipped at its upper portion with a valve (3) so that the discharge port (4) of the stem (5) of the valve (3) is opened when the stem (5) is depressed. The head cap (2) is attached to the upper portion of the pressure-tight container (1), and is equipped with an inlet port (11) having an injection port (10) and fitted in the stem (5) of the valve (3) of the pressure-tight container (1). The head cap (2) has such an injection passage (12) formed therein as extends from the inlet port (11) to the injection port (10).
