Abstract: There is disclosed an incubator (1) for hatching the eggs (12) of birds, comprising a cover (2), a base (10) for supporting the eggs (12), a flexible screen (5) which is associated with the cover (2) and is sufficiently loose to be able to follow the contour of the upper region of the eggs (12) positioned on the base (10) below the screen (15), a device such as a fan (13) for creating a super-atmospheric pressure in the chamber (7) defined between the cover (2) and the screen (5), and a device such as a heater (8) for heating air in the chamber (7).