Image forming apparatus

An image forming apparatus which a cartridge provided with a first member and a second member is mountable to and dismountable from, the image forming apparatus comprising:

• an open/close portion configured to take an open state in which the cartridge is mountable to and dismountable from the image forming apparatus and a closed state in which the cartridge is restricted from being mounted to and dismounted from the image forming apparatus;
• a first circuit configured to generate a first voltage to be supplied to the first member;
• a second circuit provided with a switching element configured to generate a second voltage, to be supplied to the second member, by dividing the first voltage;
• a controller configured to control turn on and turn off of the switching element;
• and
• a detecting portion configured to detect the open state of the open/close portion,
• wherein the controller controls the switching element so as to turn on when the detecting portion detects the open state of the open/close portion.