This invention provides a plasma tube array-type display sub-module capable of reducing a possibility of occurrence of troubles on a plasma tube array during a manufacturing process even in a case where irregularities are formed on the back side of the plasma tube array, and a display device. The plasma tube array-type display sub-module comprises a plasma tube array including a plurality of plasma tubes arranged in parallel, the plasma tube array being held between an address electrode support sheet having address electrodes formed thereon and a display electrode support sheet having display electrodes formed thereon, wherein the plasma tube array is fixed to a sub-module frame through an intermediate layer that is made of a material more flexible than that of the plasma tube array and can deform along the irregularities on the address electrode support sheet of the plasma tube array.