Method for producing a fiber composite component, in particular for aerospace, having the following method steps: forming a moulding core that comprises a predetermined number of hollow bodies for defining an external geometry of the moulding core, the hollow bodies being designed such that they extend in the longitudinal direction of the moulding core and are expandable elastically at least in their lateral direction, and are fixed to one another, the formed moulding core having a flexible outer layer for smoothing the contour of its outer surfaces, and a core sleeve surrounding the moulding core, for sealing the moulding core from the fiber composite component to be produced; placing at least one fiber semi-finished product, at least in places, on the moulding core (that has been formed, in order to shape at least one moulding section of the fiber composite component to be produced; and applying heat and/or pressure to the at least one moulding section in order to produce the fiber composite component.