Image forming apparatus having sheet bonding apparatus

A sheet bonding apparatus comprising:

• applying means configured to apply a powdery adhesive onto a sheet;
• fixing means configured to fix the powdery adhesive, on the sheet, applied onto the sheet by the applying means;
• folding means configured to fold the sheet passed through the fixing means;
• and
• bonding means configured to bond together folded surfaces of the sheet with the powdery adhesive by heating the sheet folded by the folding means, the bonding means including a heating member and a non-heating member which oppose to each other and which are for bonding the sheet by nipping the sheet therebetween,
• wherein two regions opposing to each other when the folding means folds the sheet are a first region and a second region, and
• wherein in a case that when the bonding means bonds the folded sheet, the first region is positioned on a heating member side and the second region is positioned on a non-heating member side,
• the applying means applies the powdery adhesive so that an application amount of the powdery adhesive on the sheet is smaller in the first region than in the second region.