Image forming apparatus

An image forming apparatus, comprising:

• an apparatus main body;
• a fixing unit fixing an unfixed image, which is formed on a recording material, onto the recording material at a fixing nip portion, the fixing unit being mountable to and detachable from the apparatus main body and including a pressure applying portion applying a pressure to the fixing nip portion and a pressure releasing portion releasing the pressure applied to the fixing nip portion by acting on the pressure applying portion;
• an opening/closing member disposed in the apparatus main body in an openable/closable manner;
• an engaging portion disposed in the apparatus main body and engaging with the pressure releasing portion of the fixing unit in a state of being mounted to the apparatus main body for moving the pressure releasing portion, the engaging portion moving in conjunction with an opening/closing action of the opening/closing member;
• and
• a phase adjusting portion adjusting a phase of the pressure releasing portion to a phase of the engaging portion when the opening/closing member is opened, in conjunction with a mounting action of the fixing unit to the apparatus main body.