Disclosed is a stamp head (1) for printing uneven surfaces, especially agricultural products such as poultry eggs, by means of screen printing. The stamp ink is stored in a tampon (5) within a stamp chamber (2) and is transferred to the egg surface with the aid of structures of a small coated screen printing plate (4). The stamp head (2) can be fastened to a stamp guiding assembly (7) via a stamp pressing element (10) such that an egg stamp (50) is created which can be vertically moved up and down on a stamp bar (18), the stamping process being carried out by means of the vertical movement. Several egg stamps (50) can be mounted on the stamp bar (18) such that a stamping apparatus is created which allows several eggs to be printed simultaneously.