The present invention relates to a structure for a dental impression material mixing tip and, more specifically, to a structure for a dental impression material mixing tip, having a configuration that cartridge sockets, through which each of an impression material and a hardening material separately accommodated is discharged, is coupled into a connector of a mixing tip to minimize a remaining amount of the impression material, supposed to be wasted after use, existing within the mixing tip； forming a tapered mixing tip coupling step coupled to a mixing tip coupling end of a cartridge to increase sealing and coupling force between the mixing tip and the cartridge； and primarily separating and mixing the impression material and the hardening material, discharged through each of the separated cartridge sockets, along both sides of a mixing room partition in a mixing room chamber space formed adjacent to a discharge hole, secondarily separating and mixing the impression material and the hardening material through a mixing room discharge board recess opened toward an upper side of the mixing room partition, and finally performing additional mixing for the impression material and the hardening material by using a mixing vane integrally formed at a central part of the mixing room discharge board groove on an upper side of a mixing tip connector to enhance mixing ratio of the impression material and to reduce the number of steps of the mixing vane compared with a conventional mixing part, wherein the mixing vane includes: a mixing vane shaft as a core； a bottom part at a directly upward position adjacent to the mixing room discharge board recesses of both sides； both ends formed in the directions of opened parts of the mixing room discharge board recesses； and a middle part composed of mixing vane modules at each 90° where the mixing vane module is integrally formed with 360° screw structure around the mixing vane shaft, thereby remarkably saving costs of the impression ma
