To provide a versatile outdoor pillow that can firstly reduce load on the neck and the shoulders and lessen especially fatigue of a driver who is forced to maintain a fixed posture for many hours, and can secondly be used handily in any place whether in an automobile, indoors or outdoors especially to stably support a wide range from the neck to the head of a person sitting on an automobile seat because it can easily be attached to and detached from a headrest and is portable.

In this door pillow made up of a cover member, a filler stored in the cover member, and a strip fastener provided in the side edges of the part of the cover member that butts a headrest, the filler is provided with a projection of a nearly circular arc section.