The present invention provides an air bag unit and manufacturing method thereof, and an air cushion, wherein the width of the cross section of each air bag is shorter and the height is higher, so that the air bags may be sufficiently sunk while expanding and shrinking alternately to sleep comfortably and may be easily arranged in a row. An air bag unit (10) is composed of a plurality of air bags (1). While making the air bag unit, two sheets are linearly welded at a plurality of locations to form an air bag. Moreover, a hanging portion is welded at the middle of the interior of a longitudinal elliptical air bag. Because a plurality of air bags are connected by the welding portions, the manufacturing of air cushion by arranging the air bags as a row may be easier and the manufacturing cost is lower.提供可以讓各氣囊的橫剖面的寬度短且高度變高，交互膨縮時得到充分的下沉，睡起來舒適，並且容易排成一列的氣囊單元及其製造方法以及氣墊。由複數個的氣囊(1)構成一個的氣囊單元(10)，在製造該氣囊單元時，將兩片的片材在複數部位上線形熔接而形成氣囊。另外，將吊部熔接於縱長橢圓狀的氣囊的內部的中間部。由於複數個的氣囊以熔接部連結，因而在使氣囊排成一列來製造氣墊時容易，成本較低。
