An optoelectronic semiconductor component and a 3D printer are disclosed. In an embodiment the component includes a carrier, a plurality of individually controllable pixels configured to emit radiation during operation, wherein the plurality of individual pixels is mounted on the carrier and is formed from at least one semiconductor material and a plurality of transport channels configured to transport a gas or a liquid through the semiconductor component in a direction transverse to and towards a radiation exit side of the semiconductor component, wherein the pixels are configured to emit radiation having a wavelength of maximum intensity of 470 nm or less, and wherein all pixels include the same semiconductor layer sequence and emit radiation of the same wavelength.