the present invention relates to a device for continuously monitoring the junction of a conveyor belt which is made of rubber or a rubber - type plastic material and which comprises supports inserted therein for reinforcing the same . in an advantageous embodiment , the device essentially comprises the following constituent members for the junction area : mainly four reference marks , two addresses as well as four detection heads , the heads being located above the carrier surface of the conveyor belt . this invention further relates to other advantageous embodiments of this device .