WIRELESS SEATBELT REMINDER DEVICE

A technology is provided that secures the straightness of an electromagnetic wave signal transmitted and received according to the fastening of a buckle. A wireless seatbelt reminder device includes a tunnel member that is disposed in parallel to a seat rail, and has a passage formed therein. A sub-transmission and reception unit transmits an electromagnetic wave signal in the longitudinal direction of the passage as a seatbelt is fastened to a buckle and a main transmission and reception unit receives the electromagnetic wave signal transmitted by the sub-transmission and reception unit inside the passage to transfer the electromagnetic wave signal to an integrated controller.