An object is to provide an image pick up apparatus in which positioning of
a lens barrel unit relative to a front cover with respect to the optical
axis direction and directions perpendicular to the optical axis can be
effected with high accuracy. In an image pick up apparatus including a
lens barrel unit 201 having a photographing optical system, a structure
216 that holds the lens barrel unit 201 in such a way that the lens
barrel unit 201 is movable in the direction of the optical axis of the
photographing optical system and directions perpendicular to the optical
axis and a front cover 205 that covers the front side of the image pick
up apparatus, the position of the lens barrel unit 201 relative to the
front cover with respect to directions perpendicular to the optical axis
and with respect to the optical axis direction is determined by the front
cover 205 when the front cover 205 is assembled.