A case of prolonged socket bleeding after extraction is reported to have been caused by a recent green pit viper snake bite. The snake is a common tropical creature. Several cases bitten are seen in general medical clinic yearly. Pain and local symptoms lead most patient to doctor's attention; while coagulopathy, the other clinical features are usually not being aware of. The 66-year-old patient who had been bitten by the snake a day earlier, of having tooth extraction was referred to Rachaburi Hospital Dental clinic of having post-extraction delayed haemostasis. A routine heamostasis as of gel foam with adrenalin pack and vitamin K injection was unsuccessful. Further laboratory investigations confirmed that he had hypofibrinogenemia as the pathogenic cause. Fresh frozen plasma was administered, haemostatis was satisfactory within 24 hrs.