A finger joint rehabilitation device includes a bearing base for bearing a finger root a moving member pivoted to the bearing base for bearing finger knuckles and a motor arranged on the bearing base. The motor has a transmission shaft, and the transmission shaft is connected thereon with a transmission member. The transmission member is connected with the moving member. When the transmission member is driven by the transmission shaft of the motor, the moving member is driven to pivot relative to the bearing base, so that the finger root and finger knuckles of the user can be automatically driven to perform a rehabilitation action.