<；P>；PROBLEM TO BE SOLVED: To provide a device of an animal experiment, reducing the stress of a subject animal under a non-anesthetic state during the experiment and position-fixing its brain in a state that the subject animal does not rage so as to make the animal perform lever operations efficiently. <；P>；SOLUTION: This device of animal experiment 10 which is a retention part having a dimension of the subject animal along its trunk part, is provided by equipping the retention part 20e having an entrance part for invading the subject animal into the retention part, a head part-opening for appearing the head part of the subject animal and a heat-fixing part 22 for fixing the head part of the subject animal. <；P>；COPYRIGHT: (C)2008,JPO&INPIT
