Abstract: An ice fishing tip-up which includes an insulating heating structure integrated with a fish indicator. The device is comprised of a four-walled enclosure which surrounds a heating element mounted on the interior. Contained within the enclosure is a fishing structure consisting of a rotatable shaft and a spool containing fishing line which is used to catch the fish. Connected to the exterior of the enclosure is a fish indicator which is connected at one end to the wall of the enclosure and engages the portion of the shaft extending to the exterior of the enclosure. With the heating element in place, a cover is placed over the top surface of the enclosure to retain heat within the enclosure and prevent the ice fishing hole from freezing over. When a fish strikes the fishing line, the shaft rotates and releases the fish indicator, signaling to the fisherman that a fish has been hooked.