Lens barrel having cam cylinder with cam groove

A lens barrel comprising:

• a lens holding frame that holds a lens and that includes at least three follower pins;
• a guide cylinder that is provided on an inner circumferential side of the lens holding frame and that linearly guides the lens holding frame in an optical axis direction;
• and
• a cam cylinder that is provided on an outer circumferential side of the guide cylinder and that rotates around an optical axis to move the lens holding frame in the optical axis direction,
• wherein at least three different kinds of cam grooves are formed on the cam cylinder, and at least two cam grooves of the cam grooves intersect with each other at a predetermined intersection, and
• wherein when one of the at least three follower pins is positioned at the intersection, the other at least two follower pins engage with corresponding cam grooves of the at least three different kinds of cam grooves in a compression direction.