Abstract: A carrying structure is provided and is defined with a main area and a peripheral area adjacent to the main area, where a plurality of packaging substrates are disposed in the main area in an array manner, a plurality of positioning holes are disposed in the peripheral area, and a plurality of positioning traces are formed along a part of the edges of the plurality of positioning holes, such that the plurality of positioning traces are formed with notches. Therefore, a plurality of positioning pins on the machine can be easily aligned and inserted into the plurality of positioning holes by the design of the plurality of positioning traces.