To provide an exercise device for small animals which allows a small animal to rotate a wheel body comfortably and safely and facilitates cleaning by wiping.SOLUTION: An exercise device for small animals includes: a wheel body 1 which has a shape with an opening in the front and has a circumferential wall part 11 and a back wall part 12 of a circular plate shape； and a rotation support unit Y for rotatably pivoting the wheel body 1 about a horizontal axis center L. The rotation support unit Y includes a support member 5 having a shaft part 51 inserted into an inner peripheral surface 41 of a bearing 4 and a rotating member 2 attached to an outer peripheral surface 42 of the bearing 4. The rotating member 2 is attached to a side of a rear surface 12b of the back wall part 12 of the wheel body 1 without penetrating the back wall part 12, and a front surface 12a of the back wall part 12 is formed into a smooth surface without a protruding part.SELECTED DRAWING: Figure 1
