Fixing device

A fixing device, comprising:

• an endless belt;
• a roller being in contact with an outer surface of the endless belt;
• a nip plate disposed in the endless belt;
• a supporting member disposed in the endless belt and supporting the nip plate;
• a spring member disposed in the endless belt between the nip plate and the supporting member, the spring member urged in a first direction away from the nip plate toward the supporting member;
• and
• a sliding sheet having a first surface and a second surface opposite the first surface, the sliding sheet being nipped with the endless belt between the nip plate and the roller, the first surface being in contact with an inner surface of the endless belt and the second surface of the sliding sheet being in contact with the nip plate;
• wherein the sliding sheet is fastened to a facing surface of the spring member that is facing toward the supporting member and away from the nip plate, and the second surface contacts the spring member.