To provide a rear wiper device capable of preventing the floating of the wiper blade due to traveling wind by a simple constitution.

The device is provided with first and second fins 30a, 30b having inclined surfaces inclined in the separating direction from rear window glass 2 from the front side of a vehicle body 1 to the rear side on the top of a primary lever 25 and a secondary lever 26 in a state that the wiper blade 15 is held at a non-operational position. When traveling in holding the wiper blade 15 at the non-operational position, the traveling wind circulating from the front side of the vehicle body to the rear side along the rear window glass 2 is blown upward the rear side of the vehicle body by the fins 30a, 30b, and a pressing force F toward the rear window glass 2 side is generated on the wiper blade 15.