A lens barrel capable of forming high-accuracy barrel body and simply adjusting a tilt and a position in an optical axis direction without using dedicated portions is provided. The lens barrel includes a front barrel and a rear barrel. An inner diameter of a portion, containing a focus lens of the front barrel, is 1.15 times or more as large as an inner diameter of a portion containing a zoom lens of the rear barrel. The rear barrel and the front barrel are coupled by a coupling screw. A convex portion has an adjustment face for adjusting a distance between the focus lens and the zoom lens and is formed on a coupling face of the front barrel. A convex portion includes a reference face serving as a reception portion and is formed on the rear barrel.