The present invention relates to an oven cavity (10) for a cook-ing oven. The oven cavity (10) comprises a cavity wall (12) en-closing an interior space (14) of said oven cavity (10). The cavity wall (12) includes two side walls, a top wall, a bottom wall and a rear wall. The cavity wall (12) is enclosed by at least one insulating layer (20). At least one air spacer (18) is arranged between the insulating layer (20) and at least one cor-responding wall of the cavity wall (12). The air spacer (18) is aligned at the corresponding wall of the cavity wall (12). The air spacer (18) includes at least one plane portion (22) ar-ranged parallel to the corresponding wall of the cavity wall (12). At least one air chamber (16) is formed between the air spacer (18) and the corresponding wall of the cavity wall (12).