In Madrid of the 20's, many women were hired as wet nurses for middle class families. Milk is paid very well, so women are turning to the honest services of Paco, glazier by trade, which completes his monthly salary getting pregnant the clients who pay for it.
| Directing | Didier Haudepin | Director |
| Writing | Nadie Feuz | Writer |
| Writing | José María Forqué | Writer |
| Writing | Andrés Laszlo | Novel |
| Writing | Didier Haudepin | Dialogue |
| Production | Luis Méndez | Producer |
| Production | Hubert Niogret | Producer |
| Sound | Serge Perathoner | Music |
| Camera | Gilberto Azevedo | Director of Photography |
| Editing | María Luisa Soriano | Editor |
| Editing | Alberto Yaccelini | Editor |
| Art | Wolfgang Burmann | Set Decoration |
| Costume & Make-Up | Antonio Muñoz | Costume Design |
| Production | Esteban Gutiérrez | Assistant Production Manager |
| Production | Rafael Gómez de Marcos | Assistant Production Manager |
| Production | Mario Morales | Production Manager |
| Directing | Philippe Leriche | First Assistant Director |
| Art | Manuel Rincón | Property Master |