In order to produce a shoe, an outsole is firstly inserted in a hollow mold. This outsole has fixing means, which are formed by upwardly projecting neps and which fix a shoe upper of the shoe inside the hollow mold. The hollow mold is covered on the top by an upper mold, which rests on an upper sole while leaving a free space open between its edge and a lateral wall of the hollow mold. A wedge-shaped element is inserted into said free space from the top. This element leaves a narrow gap open through which a cork-latex mixture can exit during expansion.