A holding apparatus includes a receiving element and an elastic element. The receiving element is fixed on a circuit board and receives an upright plug-in element. The receiving element defines two through holes in two sides of the receiving element. The through holes have different axial lines. The elastic element includes a main pole and two branch poles respectively perpendicularly extending down from two ends of the main pole. Two opposite pins respectively extend from distal ends of the branch poles. The pins of the elastic element are respectively inserted in the through holes of the receiving element, to locate the upright plug-in element between the elastic element and the receiving element.