A method for manufacturing a fiber-reinforced hollow structural component, in which a mold core is manufactured, the mold core and fibers (12a, 12b) with a matrix material are introduced into a molding tool, so that a first fiber unit with the matrix material is located between the mold core and the molding tool in order to at least partially form a component wall, the matrix material is cured as a result of a change in temperature and/or pressure in order to form the hollow structural component and, after the curing, the mold core is flushed out of the hollow structural component in order to form a component cavity, at least one channel extending through the mold core is formed in the mold core, which channel is primarily formed with the mold core during the manufacture of the mold core, a second fiber unit and/or matrix material are/is introduced into the channel, and so that the second fiber unit is connected, at its two ends, to the particular assigned areas of the first fiber unit, while forming two connection areas so that, after the matrix material has cured and the mold core has been flushed out, a reinforcing element is formed, which extends through the component cavity and is connected, in the area of its two ends, to the component wall in a form-locking and/or integrally joined manner characterized in that the mold core is primarily formed together with its at least one channel in a rapid prototyping method the fibers of the second fiber unit are introduced into the channel with the aid of an, in particular, pneumatic and/or mechanical introduction device, and the at least one of the two connection areas is formed on an outer side of the first fiber unit. in which a mold core is manufactured, the mold core and fibers (12a, 12b) with a matrix material are introduced into a molding tool, so that a first fiber unit with the matrix material is located between the mold core and the molding tool in order to at least partially form a component wall, the matrix material is cured as a result of a change in temperature and/or pressure in order to form the hollow structural component and, after the curing, the mold core is flushed out of the hollow structural component in order to form a component cavity, at least one channel extending through the mold core is formed in the mold core, which channel is primarily formed with the mold core during the manufacture of the mold core, a second fiber unit and/or matrix material are/is introduced into the channel, and so that the second fiber unit is connected, at its two ends, to the particular assigned areas of the first fiber unit, while forming two connection areas so that, after the matrix material has cured and the mold core has been flushed out, a reinforcing element is formed, which extends through the component cavity and is connected, in the area of its two ends, to the component wall in a form-locking and/or integrally joined manner characterized in that the mold core is primarily formed together with its at least one channel in a rapid prototyping method the fibers of the second fiber unit are introduced into the channel with the aid of an, in particular, pneumatic and/or mechanical introduction device, and the at least one of the two connection areas is formed on an outer side of the first fiber unit.