Fixing device and image forming apparatus

A fixing device comprising:

• an endless belt rotatably suspended by a plurality of suspending members;
• a pressurizing member that abuts against an outer circumferential surface of the endless belt;
• a nip forming member that is brought in contact with an inner circumferential surface of the endless belt and that forms a nip portion between the endless belt and the pressuring member in a position opposed to the pressurizing member;
• a tensioning member that rotatably suspends the endless belt and that presses the endless belt to endow the endless belt with tension;
• a first holding member supported such that the first holding member can be moved between a pressing position where the endless belt is pressed by the tensioning member and a releasing position where the pressing by the tensioning member on the endless belt is released, the first holding member being configured to hold the tensioning member in the releasing position that is distanced from the pressing position in a direction opposite the pressing direction for a first distance;
• and
• a second holding member configured to hold the tensioning member in the middle position distanced from the pressing position in a direction opposite the pressing direction for a second distance shorter than the first distance.