PURPOSE: To obtain a foam-molded material of synthetic resin which keeps off a harmful insect, such as a tick, by a method wherein a mica is incorporated in or bonded to the molded material.

CONSTITUTION: It is preferable for incorporating a mica in a foam-molded material of a synthetic resin that fine powder of mica is mixed in the synthetic resin. It is preferable for bonding a mica to the molded material that a dispersion of mica in a suitable solvent is applied and dried on the material. As the coating method, a dipping method, a spraying method, a brushing method, and the like can be used. At this time, as the synthetic resin, resins which can be foam-molded can be used without a particular limit. For example, a polystyrene resin, a polyurethane resin can be used. In addition, as the mica, a phlogopite, a muscovite, and the like are preferably used. These are used singly or in combination.