The present invention provides a seamless capsule for exterminating harmful insects that is particularly effective against termites. Said seamless capsule for exterminating harmful insects: has few adverse effects on ecosystems unrelated to harmful insects, such as people using said seamless capsule, and nearby livestock and beneficial insects； has excellent safety； is excellent in terms of the proportion transported (i.e., the transport rate) by harmful insects, particularly termites； and improves pest control efficiency per number transported or per hour. The present invention further provides a method for exterminating harmful insects using the seamless capsule for exterminating harmful insects. The present invention pertains to a seamless capsule for exterminating harmful insects: comprising a coating material layer containing a non-encapsulating material and an encapsulating material； having an active ingredient for exterminating harmful insects contained in the encapsulating material and/or the coating material layer； and imitating termite eggs by coating the surface with an egg-identifying pheromone. Furthermore. the present invention is characterized by having a surface roughness (Ra) of 0.005 to 5 μm.
