PROBLEM TO BE SOLVED: To provide a surface layer construction method of a wall surface, the method that is improved to be able to close the left right ends of a surface layer material supply space reliably without exception, while eliminating the breakage of released paper and the complication of construction.SOLUTION: A surface layer construction method of a wall surface is configured by: sequentially feeding a surface material 7 on the surface side of a heat insulation material supply space k in synchronization with upward movement of a construction machine A while slightly separating a presser face plate 9 from a wall surface 4 and forming the heat insulation material supply space k; injecting a heat insulation material 8 between the fed surface material 7 and the wall surface 4, and forming an insulating layer g of the unit width where the injected heat insulation material 8 and the surface material 7 are integrated; and repeating insulating layer construction of this unit width several times, and constru
