This invention provides an image input apparatus which allows easy positioning between an original and a camera head and can improve operability in a document photographing mode. The apparatus has a camera head arranged at the distal end side of columns coupled via a plurality of joint portions, a signal processing unit incorporated in a base of the apparatus main body that supports the proximal end side of the columns, and a cable which is arranged along the columns and connects the camera head and the signal processing unit. When an image signal is input from the camera head to the signal processing unit, the optical axis direction of the camera head and its angle about the optical axis are adjustable via the joint portions. The camera has a lens portion which allows a rotation operation, and an index that can indicate its rotation state is at an appropriate position on the outer surface of the lens portion. The column is supported by the base via a third joint portion. A signal processing circuit board is arranged between a bottom plate and a weight which are electrically connected to each other. An index indicating the direction of the camera head with respect to the base is arranged at least at the center of the front surface of the base. The apparatus is arranged so that the route of the cable does not interfere with the pivot axes of the respective joint portions.