Assembling structure for wheel and hub of electric bicycle

An assembling structure for wheel (20) and hub (10) of an electric bicycle is disclosed, the structure capable of firmly assembling a hub and a wheel by separately manufacturing the hub embedded with a motor and a transmission gear box from the wheel, the structure including a hub (10) accommodating a motor therein, a wheel (20) coupled to one side of the wheel by way of a sliding method, a groove unit (11) circumferentially arranged at a periphery of the hub (10), and a lug unit (24) formed at an area coupled to the hub of the wheel and meshed with the groove unit (11) to allow the wheel to rotate with the hub, whereby coupling of the wheel and the hub is simplified to reinforce the coupling force therebetween.