Patent ID: 8238041

Claim:
A lens barrel that has a first barrel member and a second barrel member, and arranges the first barrel member on an outer circumference of the second barrel member to enable the first barrel member to move in an optical axis direction, the lens barrel comprising: a plurality of supporting portions provided in an outer circumferential portion of the first barrel member, the plurality of supporting portions can be distorted in a radial direction when an external force is applied to the plurality of supporting portions; a plurality of engaging members configured to be held by the first barrel member and engaged with an engagement groove formed in the second barrel member, and to move in the optical axis direction along the engagement groove when the second barrel member rotates; and an annular urging member that is supported by the plurality of supporting portions at two or more points and provided in the outer circumferential portion of the first barrel member and configured to urge the plurality of engaging members to the engagement groove formed in the second barrel member, wherein an inner diameter of the annular urging member is smaller than a diameter of a circle formed by connecting outermost points of the plurality of supporting portions.