To provide an extremely simple and inexpensive insecticidal necklace for pets.

This simple insecticidal necklace for pets such as dogs, cats, etc., is obtained by forming gap parts X at the middle part of a surface material and a rear surface material by installing distance keeping tools 3 at a constant interval and also forming an adhesive part 4 at the surface material and the rear surface material facing to the gap parts X, or installing distance keeping tools 3 at the both sides of the surface material and the rear surface material between them and a wavy sheet attached with adhesive part 4 at both of the surface and rear surface thereof at the gap parts of the surface material and the rear surface material, and also installing a double-coated adhesive tape at either one of the end parts of the surface material or the rear surface material.