Fixing device capable of restricting heater from bending toward pressure roller, image forming apparatus

A fixing device comprising:

• a fixing belt;
• a heater having a shape of a flat plate and provided in contact with an inner peripheral surface of the fixing belt, wherein an end portion of the heater in a width direction of the fixing belt is exposed to outside the fixing belt;
• a pressure roller provided to face a contact surface of the heater across the fixing belt, the contact surface of the heater being in contact with the fixing belt, opposite ends of the pressure roller in the width direction being located inside the fixing belt, the pressure roller being pressed against the fixing belt;
• a heater support member including a recessed portion in which the contact surface of the heater is stored, and supporting the heater by being in contact with a surface of the heater opposite from the contact surface;
• a belt guide member provided outside the fixing belt in the width direction and configured to guide the fixing belt to move along a moving path;
• and
• a restriction portion provided in the belt guide member to face the contact surface of the heater stored in the recessed portion and configured to restrict the end portion of the heater in the width direction from being bent toward the pressure roller when the pressure roller is pressed against the fixing belt, wherein
• the belt guide member includes a support portion provided to face the restriction portion across the heater support member and, together with the restriction portion, hold the heater support member,
• the heater is located more inside of the recessed portion than an edge of the recessed portion, or the heater is located to be flush with the edge of the recessed portion, and
• the heater support member includes an exposed portion that is exposed to outside the fixing belt, and the heater support member is formed such that the exposed portion is inserted between the restriction portion and the support portion.