Abstract: A collapsible, portable pet rest attachable to a bed has a rigid, flat, horizontal base with fixedly attached vertical rear and side walls. A rigid, flat support panel pivotally attached to the back wall can be positioned horizontally aft of the base. A front wall pivotally attached to the base can be secured into a horizontal position with latches. Legs pivotally attached to the front wall provide frontal support of the pet rest when the front wall is secured horizontally and the support panel is in place between a cushion and an underlying support cushion such as a mattress and box-spring. Adjustable leg extensions permit various elevations from a floor. An optional, movable shelf adds width when attached to the base and extended out horizontally. The pet rest will hang vertically against a bed in a box-like configuration with the support panel in place between the mattress and box-spring. For portability, fastening devices maintain closure of the box-like unit. A handle is attached for manual carrying.