An image pickup apparatus includes a lens barrel. The lens barrel includes a fixture cylinder fixed onto an image pickup apparatus body, and provided with a plurality of cam grooves, and a movement cylinder provided with a plurality of cam followers, and configured to move in an optical axis direction as the cam follower rotates around an optical axis. One cam groove includes a non-engagement area that is not engaged with the cam follower. When the cam follower is located in the non-engagement area, a supporting member of a fixture cylinder supports in a radial direction a supported member that is provided to a part of the movement cylinder on an image plane side, and a part of the movement cylinder closer to the object side than the supported member is supported by the fixture cylinder in the radius direction via an elastic member.