The purpose of the present invention is to provide a pet bed which is not soiled by liquids such as liquid excrement and cleaning solutions, and which can maintain excellent sanitary conditions. This pet bed (1) is provided with a bed main body (5) that includes: a frame (3) which has a prescribed thickness; and a mat (4) which is less thick than the frame (3) and is detachably fitted into the frame (3). The pet bed (1) is provided with an absorbent sheet (2) on the top surface of the mat (4), and, in an opened state, the area in plan view of the absorbent sheet (2) is greater than the area in plan view of the top surface of the mat (4).