Wiper device is disclosed. a wiper device includes a wiper blade tightly contacted to a windshield and configured to wipe a foreign substance and an adaptor connecting the wiper blade to a wiper arm, wherein the adaptor includes a body rotatably connected to the wiper blade about an axle formed in a traverse direction of the wiper blade, and a connector extended in a lengthwise direction of the wiper blade and having one end that is connected to the wiper arm and the other end that is hinge-connected to the body. Since it is possible to adjust the wiper arm and the wiper blade in various angles, the wiper blade can be tightly contacted to the windshield and thus have a superior wiping performance.