Abstract: A reinforced air mattress sleeping bag includes an air mattress unit with upper and bottom mattresses, a head rest piece and a head covering. The head rest piece can be formed by extending the bottom air mattress at a distance suitable for accommodating the user's head, or can be formed separately to be connectable to the mattress by a fastening device. The upper and bottom mattresses of the air mattress unit, when inflated, can prevent the inner sleeping bag received therebetween from dampness, and the head rest piece provided with the head covering prevents the user from mosquitos and other insects.