An adhesive supplying device that is adapted to pressurize and supply an adhesive to a nozzle from which the adhesive is dischargeable, the device comprising: a driving source support portion; a driving source supported by the driving source support portion; a pump mechanism portion driven by power of the driving source, and that is adapted to pressurize the adhesive; a pump chamber that houses the pump mechanism portion; a first unit that includes the pump mechanism portion and that is adapted to connect the pump mechanism portion to the driving source by being detachably connected to the driving source support portion; and a second unit that includes at least a channel (72, 73) adapted to lead the adhesive pressurized by the pump mechanism portion; wherein the first unit includes a first connecting structure (63, 53) to be connected to the driving source support portion, and the second unit includes a second connecting structure (68, 58) to be connected to the first unit; wherein: the first connecting structure (63, 53) is provided at a position where the first connecting structure (63, 53) is not covered by the second unit in a condition where the second unit is connected to the first unit so that the first unit is connectable to and detachable from the driving source support portion without removing the second unit from the first unit in a condition where the second unit is connected to the first unit, characterized in that the pump mechanism portion is a gear pump including: a drive gear that rotates when connected to a motor, which is the driving source; and a driven gear that meshes and rotates with the drive gear; the second unit forms the pump chamber together with the first unit by being detachably connected to the first unit; and the gear pump can be exposed for cleaning or replacement by removing only the second unit from the first unit. a driving source support portion; a driving source supported by the driving source support portion; a pump mechanism portion driven by power of the driving source, and that is adapted to pressurize the adhesive; a pump chamber that houses the pump mechanism portion; a first unit that includes the pump mechanism portion and that is adapted to connect the pump mechanism portion to the driving source by being detachably connected to the driving source support portion; and a second unit that includes at least a channel (72, 73) adapted to lead the adhesive pressurized by the pump mechanism portion; wherein the first unit includes a first connecting structure (63, 53) to be connected to the driving source support portion, and the second unit includes a second connecting structure (68, 58) to be connected to the first unit; wherein: the first connecting structure (63, 53) is provided at a position where the first connecting structure (63, 53) is not covered by the second unit in a condition where the second unit is connected to the first unit so that the first unit is connectable to and detachable from the driving source support portion without removing the second unit from the first unit in a condition where the second unit is connected to the first unit, the first connecting structure (63, 53) is provided at a position where the first connecting structure (63, 53) is not covered by the second unit in a condition where the second unit is connected to the first unit so that the first unit is connectable to and detachable from the driving source support portion without removing the second unit from the first unit in a condition where the second unit is connected to the first unit, a drive gear that rotates when connected to a motor, which is the driving source; and a driven gear that meshes and rotates with the drive gear; the second unit forms the pump chamber together with the first unit by being detachably connected to the first unit; and the gear pump can be exposed for cleaning or replacement by removing only the second unit from the first unit.