Image forming apparatus having sheet guide member

An image forming apparatus comprising:

• a main assembly of the image forming apparatus including
• a transfer roller configured to transfer a toner image onto a sheet;
• a fixing portion including heating roller which incorporates a heater, the fixing portion fixing the toner image transferred by the transfer roller on the sheet;
• a discharging roller configured to discharge the sheet on which the toner image is fixed by the fixing portion to an outside of the image forming apparatus;
• an intermediary conveying portion provided in a conveyance passage through which the sheet is conveyed between the fixing portion and the discharging roller and configured to convey the sheet conveyed from the fixing portion toward the discharging roller;
• and
• a guide member disposed between the intermediary conveying portion and the discharging roller and movable between a second closed position where the guide member forms a portion of the conveyance passage and a second open position where the guide member opens the portion of the conveyance passage;
• and
• an open/close member movable between a first closed position where the open/close member is closed to the main assembly of the image forming apparatus and a first open position where the open/close member is opened to the main assembly of the image forming apparatus,
• wherein the guide member is constituted to be movable to the second open position while the open/close member is positioned in the first open position, and
• wherein a rotational center of the guide member is disposed above a center of gravity of the guide member in a vertical direction in a state in which the open/close member is positioned in the first closed position.