The present invention relates to a nail driving device for driving into an object at least a first relatively long type of nail and a second relatively short type of nail (13), comprising: - a drive unit for driving a thrust or pushing member (12) for driving the nail (13) into the object, - a magazine (4) for holding a supply of nails (13) preferably arranged in an array, - a barrel (3) for driving a nail (13) therethrough in the longitudinal direction thereof during driving of the nail into the object, wherein the barrel (3) comprises a side inlet for the first and second type of nail, - an actuator (25) for actuating the driving operation, and - an attachment (2) which can be mounted in releasable manner on the nail driving device for facilitating driving of the second relatively short type of nail into the object.