The utility model provides an air cushion cylinder structure of an air bed, which mainly comprises an outer air bag and two inner air bags, wherein the two inner air bags are arranged on the inner side of the outer air bag, so that when the user lies When the air cushion cylinder structure of the air bed is used, the inner air bag supports the side of the outer air bag to prevent the user from falling from the air bed.本新型提供一種氣墊床之氣墊筒結構，主要由一外部氣袋與二個內部氣袋所組成，其中，該二個內部氣袋設置於該外部氣袋的內側，如此，當使用者躺臥於該氣墊床之氣墊筒結構上時，該內部氣袋會支撐該外部氣袋的側邊，用以避免使用者自氣墊床上掉落。
