Image forming apparatus

An image forming apparatus comprising:

• an image forming portion configured to form an image on a sheet;
• a first conveyance path through which the sheet is conveyed toward the image forming portion;
• a second conveyance path through which the sheet on a first surface of which an image has been formed by the image forming portion is conveyed again toward the first conveyance path so as to form an image on a second surface opposite to the first surface by the image forming portion;
• a curved conveyance path that is curved and configured to be continuous with the second conveyance path and merge with the first conveyance path;
• a first roller pair that is included in a plurality of conveyance roller pairs arranged along the second conveyance path, positioned most downstream among the plurality of conveyance roller pairs in a sheet conveyance direction, and configured to convey the sheet;
• a second roller pair disposed along the curved conveyance path and adjacent to the first roller pair in the sheet conveyance direction and configured to convey the sheet;
• an inner guide;
• and
• an outer guide opposing the inner guide, constituting at least part of the curved conveyance path between the first roller pair and the second roller pair together with the inner guide, and provided on an outer side in a curving direction of the curved conveyance path,
• wherein a nip line of the first roller pair and a nip line of the second roller pair intersect with each other, and
• the outer guide is movable between a first position and a second position that is farther away from the inner guide than the first position.