Authors aimed to confirm the adequate method of caloric test in rabbits and then investigated on the conditions of test, that is position of head, the temperature and quantity of water for irrigation, the time of irrigation and test interval.The results obtained were summarized as follows:1) We made clear from the anatomical study of skull in rabbits that horizontal semicircular canal is located on the line darwn through the upper part of bony external meatus and the lateral part of the supraorbital margin.Therefore we fixed the head of rabbit horizontally to the plane including the attached part of external auditory meatus and the lateral part of the upper eye-lid, in which the horizontal semicircular canal lies horizontally.And then we declined the fixed-apparatus backward about 40-50°. This is the most adequate position for induction of caloric reaction in rabbits.2) Speaking on the temperature and quantity of water for irrigation 10°C 10cc for cold stimulation and 55°C 20cc for hot stimulation, is considered to be adequate.We recommend at these conditions to irrigate for 5 seconds in one, 10 seconds in another towards the upper wall of external meatus.3) It is advisable to have at least 15 minutes intereal between first test and next one.4) On the judgment of results, it is important to consider right-left difference of duration of nystagmus rather than the length of duration.And if the right-left difference of duration is more than 10 minutes. it will be reasonable that the results of test were considered as abnormal.