A lens device is capable of simply adjusting the tilt of a lens. A lens holding frame in which a fulcrum portion is tiltably supported by a fulcrum supporting portion is fixed to a lens barrel by tightening a first screw to a first connection portion and a second screw to a second connection portion. The first screw is arranged at a position that is rotated 90° from the fulcrum supporting portion in the clockwise direction, and the second screw is arranged at a position that is rotated 90° from the fulcrum supporting portion in the counterclockwise direction. The first screw is tightened to tilt the lens holding frame about the X-axis, and the second screw is tightened to tilt the lens holding frame about the Y-axis. The amount of tightening of the first and second screws is adjusted to adjust the tilt of a first lens.