An autonomous driving device may include: a first body; a second body spaced apart from the first body; a support supported by the second body on the first body; a sensor positioned in a separation space formed between the first body and the second body; and an identification reinforcement unit positioned in a blind area within the sensing area of the sensor and obscured by the support, wherein the identification reinforcement unit is configured to be identified by an external identification entity comprising circuitry configured to perform position identification, and reinforce identifiability for position identification.