CAMERA BODY, IMAGE PICKUP UNIT, IMAGING SYSTEM, ATTACHMENT/DETACHMENT METHOD OF IMAGE PICKUP UNIT TO/FROM CAMERA BODY, MOUNTING METHOD OF IMAGE PICKUP UNIT TO CAMERA BODY, AND DEMOUNTING METHOD OF IMAGE PICKUP UNIT FROM CAMERA BODY

PROBLEM TO BE SOLVED: To provide a camera body which facilitates upgrading of a camera body and an image pickup unit separately by easing the corresponding relation of a camera body and an image pickup unit. SOLUTION: The camera body 1 is provided with a recessed portion 1A in which an image pickup unit 2 including a rectangular solid shaped case 2a having an optical system and an imaging device is detachably disposed. When the case 2a is viewed from a front side in a state where the case 2a is disposed in the recessed portion 1A, the camera body 1 has: a back face portion 1B having a back face wall 4 located on the back of the case 2a and facing a back face of the case 2a; a side face portion 1C having a side face wall 6 facing a side face of the case 2a; and an upper face portion 1D having an upper face wall 5 facing an upper face of the case 2a. The recessed portion 1A is defined by the back face wall 4, the side face wall 6, and the upper face wall 5, and is opened on three sides where the remaining faces of the case 2a are located at the time of attachment. COPYRIGHT: (C)2011,JPO&INPIT