Abstract: Provided is a lens barrel capable of realizing a smooth operation of an optical system in a lens barrel body. A lens barrel (1) includes a variable-speed zooming lever (40) that is provided along an outer periphery of a lens barrel body (10) and a fixed protrusion portion (50) that is provided along the outer periphery of the lens barrel body (10), in which the variable-speed zooming lever (40) has a first surface (43) and the fixed protrusion portion (50) has a second surface (51). In a case where a position of the variable-speed zooming lever (40) is a reference position, the first surface (43) is flush with the second surface (51), and the variable-speed zooming lever (40) and the fixed protrusion portion (50) are movable relative to each other.