PROBLEM TO BE SOLVED: To provide a sustained release sex pheromone preparation which can control-release a sex pheromone substance for a long period of time without considering a material of a plastic, a film thickness, and compatibility or affinity with a sex pheromone substance.SOLUTION: The sustained release sex pheromone preparation formed of a polymer contains at least a sex pheromone derivative which changes a sex pheromone substance when placed in atmosphere. Also, an insect pest repelling method including at least the step of releasing the sex pheromone preparation formed of a polymer to atmosphere is provided.
