A method for manufacturing a fiber-reinforced hollow structural component , in which a mold core is manufactured, the mold core and fibers 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 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 . <EOS>