A wiper device includes a long wiper blade mounted on a wiper arm provided in a vehicle and configured to wipe a surface of a glass window. The wiper blade includes a drain passage extending in a longitudinal direction of the wiper blade and formed to be hollow, and a communication path having one end communicating with the drain passage and the other end communicating with a surface of the wiper blade. The communication path is formed to have a width that draws, from the other end through the one end into the drain passage, water wiped by the wiper blade by a capillarity phenomenon, and a width of the drain passage in a direction orthogonal to the longitudinal direction is formed to be wider than the width of the communication path.