In a camera module, a lens for forming an image on an imaging element having a rectangular light receiving surface is formed in a shape obtained by removing a peripheral portion of a circular lens, such as a generally oval shape, and a cylindrical lens barrel coaxially holding the lens is formed in a shape conforming to that of the lens. A part of a focal adjustment actuator is disposed in a space created on a side of the lens barrel in correspondence with the removed portion of the lens, whereby reduction in size of the entirety of the camera module is promoted.