Imaging optical systems of imaging units of a multi-focus camera are set to form respective focal planes in a shooting space at different distances from the multi-focus camera. Front depths of field of the imaging optical systems are set to be so deep that they reach the adjacent focal planes that are arranged on the camera side of the respective focal planes. Focal lengths and magnifications of the imaging optical systems are so defined that images of any subjects of the same size are taken in the same size regardless of where the subjects are located in the shooting space.