Image forming apparatus and fixing device

An image forming apparatus comprising:

• an image forming portion configured to form a developer image on a recording medium;
• and
• a fixing device that is removably mounted to an image forming apparatus body and configured to fix the developer image formed by the image forming portion to the recording medium,
• wherein the fixing device includes:
• a first rotator,
• a second rotator configured to contact the first rotator to form an interposition region in which the recording medium is nipped between the first rotator and the second rotator,
• a pressing mechanism configured to press the first rotator and the second rotator against each other, and
• a change mechanism configured to change a force with which the pressing mechanism presses the first rotator and the second rotator against each other,
• the change mechanism being mounted to the image forming apparatus body,
• wherein the pressing mechanism includes a movable member that movable by action of the change mechanism,
• wherein the change mechanism is configured to change the force with which the pressing mechanism presses the first rotator and the second rotator by moving the movable member in a direction away from the first rotator when the changing member is in an engaged state;
• and
• wherein the movable member is released from a target of the pressing operation.