To upgrade the practicability of the feed of a nail connecting body in a magazine by using a spring. The magazine (4) is provided with (a) a rectilinear loading part (13) which loads the nail connecting body N; and (b) a feed member (34) which is loaded on this rectilinear loading part (13) so that it can slide easily. The feed member (34) is provided with (c) a slider (35) which makes up the main body; and (d) a feed pawl (43). The feed pawl (43) is attached to the slider (35) by the pin (42) so that it can turn freely and so that it can latch onto and be detached from the nail connecting body N and it is energized by the dual purpose compression torsion spring (46) at a latching position. The feel pawl (43) can be latched onto any nail n of the nail connecting body N. As a result, nail connecting bodies N can be added and nail connecting bodies N with a connection which is longer than the motion stroke of the feed member (34) can be used so that the applicability of the nail driving device can be significantly upgraded.