Fly eradication device

A fly eradication device comprises a guide bar and a high voltage conversion circuit module. The guide bar comprises an insulation layer and a conductor disposed in the insulation layer, in which the insulation layer has at least one indent to expose the conductor. The high voltage conversion circuit module is electrically connected with the conductor of the guide bar. In one embodiment, the fly eradication device further comprises a base having an installation opening utilized to arrange the guide bar, such that the guide bar can be installed on a plane. Therefore, flies, mosquitoes or insects are zapped by electric shock and killed when they rest on the guide bar of the fly eradication.