Abstract: The utility model provides an airbag for a pillow with adjustable height, wherein it is comprised: multiple airbag units arranged in stack, multiple supporting and connecting holes arranged in array in the opposite direction as the airbag units; two adjacent airbag units communicating through the said supporting and connecting holes; during the inflation or deflation process of the said airbag unit, the gas flows into or out of the airbag from the multiple supporting and connecting holes simultaneously, so that the inflation velocity of each part of the airbag unit is uniform, and the overall height of the airbag changes synchronously with the inflation or deflation. The utility model provides an airbag and a pillow for the height adjusting pillow, during the inflation or deflation process of the airbag unit, the overall height of the airbags changes synchronously with the inflation or deflation.