Device for the additive manufacture of three-dimensional objects by successive layer-by-layer selective exposure and the associated successive layer-by-layer selective solidification of layers of building material from a building material which can be solidified by means of a laser beam, comprising a process chamber, in which the successive layer-by-layer selective exposure and the successive layer-by-layer selective solidification of respective building material layers of a building material solidifiable by means of a laser beam takes place, and an exposure device, which is used for generating a laser beam for selective exposure and consequent solidification of respective layers of building material, wherein the exposure device is arranged or formed on a housing structure spaced from the process chamber in a heat-decoupled manner, characterized in that a gap space defining a distance between the exposure device and the process chamber is formed between the exposure device and the process chamber, further comprising at least one gap extending between the exposure device, in particular a laser beam decoupling point of the exposure device, via which a laser beam from the exposure device, in particular a beam deflector associated with the exposure device, and a laser beam coupling point via which a laser beam couples into a process chamber interior defined by the process chamber, and a shielding element, which is arranged or formed in the process chamber and is in particular bellows-like or sleeve-like, shielding element for shielding the laser beam extending between the exposure device, in particular the laser beam exit point of the exposure device, and the process chamber, in particular the laser beam coupling point of the process chamber. a process chamber, in which the successive layer-by-layer selective exposure and the successive layer-by-layer selective solidification of respective building material layers of a building material solidifiable by means of a laser beam takes place, and an exposure device, which is used for generating a laser beam for selective exposure and consequent solidification of respective layers of building material, wherein the exposure device is arranged or formed on a housing structure spaced from the process chamber in a heat-decoupled manner, characterized in that a gap space defining a distance between the exposure device and the process chamber is formed between the exposure device and the process chamber, further comprising at least one gap extending between the exposure device, in particular a laser beam decoupling point of the exposure device, via which a laser beam from the exposure device, in particular a beam deflector associated with the exposure device, and a laser beam coupling point via which a laser beam couples into a process chamber interior defined by the process chamber, and a shielding element, which is arranged or formed in the process chamber and is in particular bellows-like or sleeve-like, shielding element for shielding the laser beam extending between the exposure device, in particular the laser beam exit point of the exposure device, and the process chamber, in particular the laser beam coupling point of the process chamber.