Fixing device and image forming apparatus

An image forming apparatus comprising:

• a developer image forming unit that forms a developer image on a recording medium;
• and
• a fixing device that fixes the developer image on the recording medium which is formed by the developer image forming unit to the recording medium, the fixing device including:
• a first supporting member that supports one of a first forming member and a second forming member that form a nip portion by sandwiching a recording medium;
• a second supporting member that supports the other of the first forming member and the second forming member;
• a first spring that pressurizes the nip portion;
• a cam that rotates to relatively displace the first supporting member and the second supporting member in a direction in which the nip portion is released;
• a rotating portion that is disposed at a position shifted from the cam in a rotation axis direction of the cam and rotates integrally with the cam;
• and
• a second spring that exerts a force on the rotating portion in a direction opposite to a rotating direction of the cam according to the rotation of the cam when a state in which the nip portion is released transitions to a state in which the nip portion is formed.