Circuit board and image forming apparatus

An image forming apparatus comprising

• a circuit board;
• and
• an image forming part configured to perform a function related or included in forming image,
• wherein the circuit board includes:
• a first surface including a first region in which a first electronic part is mountable;
• a second surface, which is different from the first surface, including a second region in which a second electronic part is mountable;
• a first connection portion which is arranged on the first surface and to which a terminal of the first electronic part is connected;
• a first element arranged on the first surface;
• a second connection portion which is arranged on the second surface and to which a terminal of the second electronic part is connected;
• a second element arranged on the second surface;
• and
• a wiring pattern that connects the first element and the second element in parallel, and electrically connects both of the first element and the second element to the first connection portion and to the second connection portion, and
• wherein the image forming part is configured to be controlled by one of the first electronic part or the second electronic part mounted on the circuit board.