Stapler

A stapler comprising:

• a driver support part that supports an actuating mechanism of a driver for driving a staple toward sheets of paper;
• a clincher support part that is arranged apart from the driver support part in an up/down direction, and to which a clincher for clinching the driven staple is fixed;
• a positioning member provided in a vicinity of one of the clincher support part and the driver support part;
• a first positioning element provided on the positioning member;
• and
• a second positioning element provided on said one of the clincher support part and the driver support part,
• wherein the driver support part and the clincher support part are configured to be simultaneously movable in a right/left direction by substantially the same amount;
• wherein the driver is configured to carry out a stapling operation, after a clamping operation of clamping the sheets of paper between the driver support part and the clincher support part;
• and
• wherein the first positioning element and the second positioning element are configured to engage with each other in cooperation with the clamping operation.