A supporting structure for an electronic device is provided to reduce the thickness or volume of device structures in conventional skills. The supporting structure includes a connecting arm having a first end and a second end which are substantially pivoted to a side region of a sliding and/or rotating module and an edge portion of a substrate module, respectively. With the connecting arm being rotated in response to the movement of the sliding and/or rotating module, the rotation or combination type can be provided between the first and second ends of the connecting arm and the side regions of the sliding and/or rotating module and the edge portion of the substrate module, thereby improving difficulties of the internal structure and design of the assembly of conventional supporting structure and electronic device.