ANIMAL-BREEDING DEVICE

PROBLEM TO BE SOLVED: To provide an animal-breeding device capable of surely keeping the inside of a rack accommodating a small animal under a desired environment, excellent in economic property for capable of reducing the volume of supplying air, causing less piling of foreign materials and cleaning extremely easily. SOLUTION: This animal-breeding device has a breeding part 19 having shelf plates 12 of >=1 stages and consisting of a rack obstructed by a partitioning wall 13 bored with a ventilating hole 16 communicating with each of the shelf plates 12 at its back surface, a door 11 installed as openable and closable at the front surface side of the breeding part 19 and a air passage 15 formed by the partitioning wall 13 of the breeding part, also, making the door 11 as a double structure having a front surface plate 22 and a back surface plate 23, forming at least a communicating hole 24 for ventilating air by communicating each of the stages of the rack at the back surface plate, communicating the space between the front surface plate 22 and the back surface plate 23 with either one of an air-supplying means or an exhausting means, and also communicating the air passage 15 with the remaining one of the air-supplying means or exhausting means.