A booklet making apparatus comprises a heating and pressing unit that heats and presses an adhesive layer in a state where a plurality of sheets on which the adhesive layer has been formed are layered. The heating and pressing unit includes a pressing plate, a heating body that heats the pressing plate, a reception member, and a pressing mechanism. A booklet is made by heating and pressing the adhesive layer while holding the plurality of sheets on which the adhesive layer has been formed between the pressing plate and the reception member. The pressing mechanism applies pressure to the plurality of sheets held between the pressing plate and the reception member by pressing the pressing plate without applying a force to the heating body.

A sheet bonding apparatus includes a first nipping member having a first surface and for nipping a sheet bundle on which a toner image for bonding sheets together is formed, a heating portion configured to heat the first surface of the first nipping member, and a second nipping member having a second surface opposing the first surface and configured to bond the sheet bundle in an adhesive region by heating and pressing the toner image while nipping the sheet bundle by the first surface and the second surface. At least one of the first surface and the second surface includes a plurality of uneven portions for forming an uneven shape on the sheet bundle in the adhesive region.

An image forming unit forms a user image and a bonding image formed in a binding margin of a booklet and is for bonding a plurality of sheets forming the booklet. A bonding unit bonds the plurality of sheets by applying heat and pressure to the binding margin of the plurality of sheets. The image forming unit forms the bonding image and forms the user image at a first density on a sheet that satisfies a condition for enabling bonding in the bonding unit from among the plurality of sheets. The image forming unit forms the user image and does not form the bonding image or forms the bonding image at a second density lower than the first density on a sheet that does not satisfy the condition for enabling bonding from among the plurality of sheets.

Provided is a sheet thermocompression apparatus for bonding a plurality of sheets to one another, the sheet thermocompression apparatus including: a loading portion in which sheets having adhesion toner formed thereon are loaded in a loading direction; and a thermocompression unit including a pressing member elongated in a longitudinal direction, for pressing the sheets loaded in the loading portion in the loading direction, and a heating source for heating the pressing member. In a case where the pressing member is viewed from the loading direction, the pressing member overlaps a region of a sheet loaded in the loading portion from one end portion to the other end portion in the longitudinal direction. The heating source is capable of heating an end portion and a center portion of the pressing member in the longitudinal direction to different temperatures.