Fixing device and image forming apparatus

A fixing device comprising:

• a fixing belt which is formed in a cylindrical shape and heats toner on a medium while rotating around an axis;
• a pressure member which forms a pressure region between the fixing belt and the pressure member, and pressurizes the toner on the medium passing through the pressure region while rotating around an axis;
• a heater which extends in an axial direction of the axis of the fixing belt, comes into contact with an inner surface of the fixing belt in the pressure region, and heats the fixing belt;
• a heat equalizing member which extends in the axial direction so as to be less than or equal to a dimension of the heater in the axial direction, comes into contact with one surface of the heater on an opposite side to the fixing belt, absorbs heat emitted from the heater and moves it in the axial direction;
• a support member which comes into contact with one surface of the heat equalizing member on an opposite side to the heater, and supports the heat equalizing member;
• and
• a positioning structure which positions the heat equalizing member with respect to the support member, wherein
• the positioning structure includes:
• a positioning hole penetrating in a thickness direction a center region of the heat equalizing member in the axial direction;
• a positioning recess recessed in the thickness direction in a center region of the support member in the axial direction, where coincides with the positioning hole;
• and
• a positioning member fitted into a positioning space formed by the positioning hole and the positioning recess while in contact with one surface of the heater.