An　essentially　disconnected　coronoid　system　is　defined　as　a　Kekuléan　coronoid　system　which　has　fixed　(single　or　double)　bonds　and　has　at　least　one　hole.　It　is　proved　that　the　subgraph,　obtained　by　deleting　all　the　fixed　single　bonds　and　all　the　end　vertices　of　the　fixed　double　bonds,　is　disconnected,　and　has　at　least　two　normal　components,　which　generalizes　the　result　for　essentially　disconnected　benzenoid　systems　by　Gutman　et　al　[4].