An electronic device is provided, including a main body and a PCI-E insert row. The main body has a substrate, a light-emitting module and a light-guiding portion. The light-emitting module has a carrier board and a light-emitting portion disposed on the carrier board, the light-guiding portion is arranged corresponding to the light-emitting portion, and at least a part of light from the light-emitting portion is projected to outside of the electronic device through the light-guiding portion. The PCI-E insert row is disposed on the substrate, and the PCI-E insert row is for being electrically connected with the PCI-E insert slot.