The present invention relates to a coupling structure of a hub and a blade for a propeller. The coupling structure comprises: a hub; and a plurality of blades having a joining device formed on a joining surface joined to the hub. The hub receives the joining device on the joining surface joined to the blade and has a receiving groove wherein a wedge fixing device is attached to enable the hub and the blade to be coupled to each other by coupling of the wedge fixing device and the joining device.
