Sheet folding apparatus

A sheet folding apparatus comprising:

• a sheet folding unit disposed to fold a sheet;
• and
• a conveyance unit disposed to feed the sheet to the sheet folding unit in a feed direction orthogonal to a fold direction of the sheet folding unit while correcting a skew of the sheet,
• the conveyance unit including:
• an elongated reference guide;
• a conveyance mechanism disposed to convey the sheet in the feed direction while exerting a force on the sheet toward the reference guide, the skew of the sheet being corrected by the reference guide and the conveyance mechanism;
• and
• an adjustment mechanism disposed to adjust an inclination of the reference guide with respect to the feed direction,
• the sheet folding apparatus further comprising:
• an input unit through which a user inputs a folding misalignment amount of the sheet folded by the sheet folding unit, the inclination of the reference guide being corrected by the adjustment mechanism based on at least the folding misalignment amount inputted through the input unit.