An electrophotographic image forming apparatus includes an opening provided in a main assembly of the apparatus; an openable member for closing and opening the openable member; a drawer member for supporting an electrophotographic photosensitive drum, the drawer member being movable between an inside position inside the main assembly and an outside position outside the main assembly where the cartridge can be mounted and dismounted; a transfer unit disposed above the drawer member and being movable between a contact position in contact with the drum and a separation position separated from the drum in a state that the drawer member is in the inside position; and an interrelating member interrelating the openable member and the transfer unit with each other.