A stapler embodiment has a contact surface in contact with tissue in a surgical operation, an outer wall parallel to the contact surface and in contact with tissue where the surgical operation is conducted for use in surgical operations. The stapler has a left stapling group of more than one staple with the function to staple the tissue where the surgical operation is conducted, in a row position parallel to the contact surface, a right stapling group of more than one staple with the function to staple the tissue where the surgical operation is conducted, in a row position parallel to the outer wall, at least one dissecting embodiment located in the middle of the left stapling group and right stapling group and at least one driving member to provide motion of the left stapling group and right stapling group.
