An electrophotographic image forming apparatus is provided for forming an image on a recording material, to which a unit is detachably mountable. The apparatus is transportable with the unit mounted thereto. The apparatus includes (i) a movable member; (ii) a main assembly electrical contact provided on the movable member; (iii) a mounting member demountably mounting the unit; (iv) a unit mounted to the mounting member. The unit has a unit electrical contact electrically contactable to the main assembly electrical contact during image formation on the recording material; and (v) a separating member for separating the main assembly electrical contact and the unit electrical contact from each other by contacting the movable member and the unit to provide a gap between the main assembly electrical contact and the unit electrical contact when the apparatus is transported with the unit mounted to the apparatus.