An image stabilizer includes an image pickup device; a guide device which guides the image pickup device in a manner to allow the image pickup device to move linearly in a plane orthogonal to an optical axis, the guide device and the image pickup device being arranged at different positions in the plane; and a flexible printed wiring board which extends from the image pickup device. The flexible printed wiring board includes an integrally-movable portion which is connected to the image pickup device to move with the image pickup device, and a freely-deformable portion extending from the integrally-movable portion. The flexible printed wiring board is orientated toward the guide device so that a boundary between the integrally-movable portion and the freely-deformable portion is positioned close to the guide device.