Plant for additive manufacturing of three-dimensional objects, comprising: - at least one movable, module-like functional unit (12a - 12d), which has a receiving space set up to receive building material, - a tunnel structure having at least one tunnel section in which at least one module-like functional unit (12a - 12d) is movable - at least one device which is set up for the additive production of a three-dimensional object by successive layer-by-layer selective exposure and associated solidification of formed building material layers by means of an energy beam, the device having a connecting section, via which the device can be connected or is connected to the tunnel structure, so that a module-like functional unit (12a - 12d) can be moved from the device into the tunnel structure or from the tunnel structure into the device, - a filling and emptying device, which is arranged for filling a receiving space of a functional unit (12a - 12d) moved into a filling region of the filling and emptying device with building material and for emptying building material located in a receiving space of a functional unit (12a - 12d) moved into an emptying region of the filling and emptying device, the filling and emptying device having a connecting section via which the filling and emptying device can be connected or is connected to the tunnel structure, so that a module-like functional unit (12a - 12d) can be moved from the filling and emptying device into the tunnel structure or from the tunnel structure into the filling and emptying device, or - a filling device which is set up for filling a receiving space of a functional unit (12a - 12d) moved into a filling region of the filling device with building material, the filling device having a connecting section, via which the filling device can be connected or is connected to the tunnel structure, so that a module-like functional unit (12a - 12d) can be moved starting from the filling device into the tunnel structure or starting from the tunnel structure into the filling device. - at least one movable, module-like functional unit (12a - 12d), which has a receiving space set up to receive building material, - a tunnel structure having at least one tunnel section in which at least one module-like functional unit (12a - 12d) is movable - at least one device which is set up for the additive production of a three-dimensional object by successive layer-by-layer selective exposure and associated solidification of formed building material layers by means of an energy beam, the device having a connecting section, via which the device can be connected or is connected to the tunnel structure, so that a module-like functional unit (12a - 12d) can be moved from the device into the tunnel structure or from the tunnel structure into the device, - a filling and emptying device, which is arranged for filling a receiving space of a functional unit (12a - 12d) moved into a filling region of the filling and emptying device with building material and for emptying building material located in a receiving space of a functional unit (12a - 12d) moved into an emptying region of the filling and emptying device, the filling and emptying device having a connecting section via which the filling and emptying device can be connected or is connected to the tunnel structure, so that a module-like functional unit (12a - 12d) can be moved from the filling and emptying device into the tunnel structure or from the tunnel structure into the filling and emptying device, or - a filling device which is set up for filling a receiving space of a functional unit (12a - 12d) moved into a filling region of the filling device with building material, the filling device having a connecting section, via which the filling device can be connected or is connected to the tunnel structure, so that a module-like functional unit (12a - 12d) can be moved starting from the filling device into the tunnel structure or starting from the tunnel structure into the filling device.