The invention has a mat member that expands according to the inflow of air and a receiving part that accommodates a pillow member that expands according to the injection of air, so that the mat member can be used to take a good night's sleep even in uneven terrain. It is a sleeping bag that is convenient to store and carry and can be used regardless of the season by releasing air to minimize its volume.
A sleeping bag body 10 including an outer skin 11 formed of a waterproof and moisture-proof fabric and having an opening for a face formed thereon; It is provided under the sleeping bag body 10 so that the mat member 21 and the pillow member 23 are accommodated, and the portion in which the mat member 21 is accommodated is formed to have the same thickness, and the pillow member 23 is accommodated. It characterized in that it comprises a; the mat member 21 is formed in a form in which the thickness decreases toward the portion in which the mat member 21 is accommodated, and the receiving portion 20 capable of opening and closing.