The present invention generally relates to a mixing tip (100) for automatically mixing dental impression material. The mixing tip (100) includes a lower coupling unit (15) formed to protrude from a lower end of a cover (10) installed in an upper portion of a housing (50) so that the amount of the impression material remaining in a disposable mixing tip after use can be minimized. A primary mixing unit (42) includes a v-shaped groove (36) formed in the outer circumferential surface, vertical vanes (37) formed between upper and lower wheels (34 and 35), and a plurality of upper and lower vertical grooves (38 and 39) formed in the upper and lower wheels (34, 35) in a misaligned manner so that a curing agent and a base paste can be evenly mixed.